Loading...
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 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
9 * Copyright (c) 2007-2010 Rising Tide Systems
10 * Copyright (c) 2008-2010 Linux-iSCSI.org
11 *
12 * Nicholas A. Bellinger <nab@kernel.org>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 *
28 ******************************************************************************/
29
30#include <linux/net.h>
31#include <linux/string.h>
32#include <linux/delay.h>
33#include <linux/timer.h>
34#include <linux/slab.h>
35#include <linux/spinlock.h>
36#include <linux/kthread.h>
37#include <linux/in.h>
38#include <net/sock.h>
39#include <net/tcp.h>
40#include <scsi/scsi.h>
41#include <scsi/scsi_device.h>
42
43#include <target/target_core_base.h>
44#include <target/target_core_device.h>
45#include <target/target_core_tpg.h>
46#include <target/target_core_transport.h>
47#include <target/target_core_fabric_ops.h>
48
49#include "target_core_alua.h"
50#include "target_core_hba.h"
51#include "target_core_pr.h"
52#include "target_core_ua.h"
53
54static void se_dev_start(struct se_device *dev);
55static void se_dev_stop(struct se_device *dev);
56
57static struct se_hba *lun0_hba;
58static struct se_subsystem_dev *lun0_su_dev;
59/* not static, needed by tpg.c */
60struct se_device *g_lun0_dev;
61
62int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
63{
64 struct se_lun *se_lun = NULL;
65 struct se_session *se_sess = se_cmd->se_sess;
66 struct se_device *dev;
67 unsigned long flags;
68
69 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
70 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
71 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
72 return -ENODEV;
73 }
74
75 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
76 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
77 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
78 struct se_dev_entry *deve = se_cmd->se_deve;
79
80 deve->total_cmds++;
81 deve->total_bytes += se_cmd->data_length;
82
83 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
84 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
85 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
86 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
87 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
88 " Access for 0x%08x\n",
89 se_cmd->se_tfo->get_fabric_name(),
90 unpacked_lun);
91 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
92 return -EACCES;
93 }
94
95 if (se_cmd->data_direction == DMA_TO_DEVICE)
96 deve->write_bytes += se_cmd->data_length;
97 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
98 deve->read_bytes += se_cmd->data_length;
99
100 deve->deve_cmds++;
101
102 se_lun = deve->se_lun;
103 se_cmd->se_lun = deve->se_lun;
104 se_cmd->pr_res_key = deve->pr_res_key;
105 se_cmd->orig_fe_lun = unpacked_lun;
106 se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
107 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
108 }
109 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
110
111 if (!se_lun) {
112 /*
113 * Use the se_portal_group->tpg_virt_lun0 to allow for
114 * REPORT_LUNS, et al to be returned when no active
115 * MappedLUN=0 exists for this Initiator Port.
116 */
117 if (unpacked_lun != 0) {
118 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
119 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
120 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
121 " Access for 0x%08x\n",
122 se_cmd->se_tfo->get_fabric_name(),
123 unpacked_lun);
124 return -ENODEV;
125 }
126 /*
127 * Force WRITE PROTECT for virtual LUN 0
128 */
129 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
130 (se_cmd->data_direction != DMA_NONE)) {
131 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
132 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
133 return -EACCES;
134 }
135
136 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
137 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
138 se_cmd->orig_fe_lun = 0;
139 se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
140 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
141 }
142 /*
143 * Determine if the struct se_lun is online.
144 * FIXME: Check for LUN_RESET + UNIT Attention
145 */
146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
149 return -ENODEV;
150 }
151
152 /* Directly associate cmd with se_dev */
153 se_cmd->se_dev = se_lun->lun_se_dev;
154
155 /* TODO: get rid of this and use atomics for stats */
156 dev = se_lun->lun_se_dev;
157 spin_lock_irqsave(&dev->stats_lock, flags);
158 dev->num_cmds++;
159 if (se_cmd->data_direction == DMA_TO_DEVICE)
160 dev->write_bytes += se_cmd->data_length;
161 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
162 dev->read_bytes += se_cmd->data_length;
163 spin_unlock_irqrestore(&dev->stats_lock, flags);
164
165 /*
166 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
167 * for tracking state of struct se_cmds during LUN shutdown events.
168 */
169 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
170 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
171 atomic_set(&se_cmd->transport_lun_active, 1);
172 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
173
174 return 0;
175}
176EXPORT_SYMBOL(transport_lookup_cmd_lun);
177
178int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
179{
180 struct se_dev_entry *deve;
181 struct se_lun *se_lun = NULL;
182 struct se_session *se_sess = se_cmd->se_sess;
183 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
184 unsigned long flags;
185
186 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
187 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
188 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
189 return -ENODEV;
190 }
191
192 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
193 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
194 deve = se_cmd->se_deve;
195
196 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
197 se_tmr->tmr_lun = deve->se_lun;
198 se_cmd->se_lun = deve->se_lun;
199 se_lun = deve->se_lun;
200 se_cmd->pr_res_key = deve->pr_res_key;
201 se_cmd->orig_fe_lun = unpacked_lun;
202 se_cmd->se_orig_obj_ptr = se_cmd->se_dev;
203 }
204 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
205
206 if (!se_lun) {
207 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
208 " Access for 0x%08x\n",
209 se_cmd->se_tfo->get_fabric_name(),
210 unpacked_lun);
211 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
212 return -ENODEV;
213 }
214 /*
215 * Determine if the struct se_lun is online.
216 * FIXME: Check for LUN_RESET + UNIT Attention
217 */
218 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
219 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
220 return -ENODEV;
221 }
222
223 /* Directly associate cmd with se_dev */
224 se_cmd->se_dev = se_lun->lun_se_dev;
225 se_tmr->tmr_dev = se_lun->lun_se_dev;
226
227 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
228 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
229 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
230
231 return 0;
232}
233EXPORT_SYMBOL(transport_lookup_tmr_lun);
234
235/*
236 * This function is called from core_scsi3_emulate_pro_register_and_move()
237 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
238 * when a matching rtpi is found.
239 */
240struct se_dev_entry *core_get_se_deve_from_rtpi(
241 struct se_node_acl *nacl,
242 u16 rtpi)
243{
244 struct se_dev_entry *deve;
245 struct se_lun *lun;
246 struct se_port *port;
247 struct se_portal_group *tpg = nacl->se_tpg;
248 u32 i;
249
250 spin_lock_irq(&nacl->device_list_lock);
251 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
252 deve = &nacl->device_list[i];
253
254 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
255 continue;
256
257 lun = deve->se_lun;
258 if (!lun) {
259 pr_err("%s device entries device pointer is"
260 " NULL, but Initiator has access.\n",
261 tpg->se_tpg_tfo->get_fabric_name());
262 continue;
263 }
264 port = lun->lun_sep;
265 if (!port) {
266 pr_err("%s device entries device pointer is"
267 " NULL, but Initiator has access.\n",
268 tpg->se_tpg_tfo->get_fabric_name());
269 continue;
270 }
271 if (port->sep_rtpi != rtpi)
272 continue;
273
274 atomic_inc(&deve->pr_ref_count);
275 smp_mb__after_atomic_inc();
276 spin_unlock_irq(&nacl->device_list_lock);
277
278 return deve;
279 }
280 spin_unlock_irq(&nacl->device_list_lock);
281
282 return NULL;
283}
284
285int core_free_device_list_for_node(
286 struct se_node_acl *nacl,
287 struct se_portal_group *tpg)
288{
289 struct se_dev_entry *deve;
290 struct se_lun *lun;
291 u32 i;
292
293 if (!nacl->device_list)
294 return 0;
295
296 spin_lock_irq(&nacl->device_list_lock);
297 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
298 deve = &nacl->device_list[i];
299
300 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
301 continue;
302
303 if (!deve->se_lun) {
304 pr_err("%s device entries device pointer is"
305 " NULL, but Initiator has access.\n",
306 tpg->se_tpg_tfo->get_fabric_name());
307 continue;
308 }
309 lun = deve->se_lun;
310
311 spin_unlock_irq(&nacl->device_list_lock);
312 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
313 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
314 spin_lock_irq(&nacl->device_list_lock);
315 }
316 spin_unlock_irq(&nacl->device_list_lock);
317
318 kfree(nacl->device_list);
319 nacl->device_list = NULL;
320
321 return 0;
322}
323
324void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
325{
326 struct se_dev_entry *deve;
327
328 spin_lock_irq(&se_nacl->device_list_lock);
329 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
330 deve->deve_cmds--;
331 spin_unlock_irq(&se_nacl->device_list_lock);
332}
333
334void core_update_device_list_access(
335 u32 mapped_lun,
336 u32 lun_access,
337 struct se_node_acl *nacl)
338{
339 struct se_dev_entry *deve;
340
341 spin_lock_irq(&nacl->device_list_lock);
342 deve = &nacl->device_list[mapped_lun];
343 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
344 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
345 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
346 } else {
347 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
348 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
349 }
350 spin_unlock_irq(&nacl->device_list_lock);
351}
352
353/* core_update_device_list_for_node():
354 *
355 *
356 */
357int core_update_device_list_for_node(
358 struct se_lun *lun,
359 struct se_lun_acl *lun_acl,
360 u32 mapped_lun,
361 u32 lun_access,
362 struct se_node_acl *nacl,
363 struct se_portal_group *tpg,
364 int enable)
365{
366 struct se_port *port = lun->lun_sep;
367 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
368 int trans = 0;
369 /*
370 * If the MappedLUN entry is being disabled, the entry in
371 * port->sep_alua_list must be removed now before clearing the
372 * struct se_dev_entry pointers below as logic in
373 * core_alua_do_transition_tg_pt() depends on these being present.
374 */
375 if (!enable) {
376 /*
377 * deve->se_lun_acl will be NULL for demo-mode created LUNs
378 * that have not been explicitly concerted to MappedLUNs ->
379 * struct se_lun_acl, but we remove deve->alua_port_list from
380 * port->sep_alua_list. This also means that active UAs and
381 * NodeACL context specific PR metadata for demo-mode
382 * MappedLUN *deve will be released below..
383 */
384 spin_lock_bh(&port->sep_alua_lock);
385 list_del(&deve->alua_port_list);
386 spin_unlock_bh(&port->sep_alua_lock);
387 }
388
389 spin_lock_irq(&nacl->device_list_lock);
390 if (enable) {
391 /*
392 * Check if the call is handling demo mode -> explict LUN ACL
393 * transition. This transition must be for the same struct se_lun
394 * + mapped_lun that was setup in demo mode..
395 */
396 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
397 if (deve->se_lun_acl != NULL) {
398 pr_err("struct se_dev_entry->se_lun_acl"
399 " already set for demo mode -> explict"
400 " LUN ACL transition\n");
401 spin_unlock_irq(&nacl->device_list_lock);
402 return -EINVAL;
403 }
404 if (deve->se_lun != lun) {
405 pr_err("struct se_dev_entry->se_lun does"
406 " match passed struct se_lun for demo mode"
407 " -> explict LUN ACL transition\n");
408 spin_unlock_irq(&nacl->device_list_lock);
409 return -EINVAL;
410 }
411 deve->se_lun_acl = lun_acl;
412 trans = 1;
413 } else {
414 deve->se_lun = lun;
415 deve->se_lun_acl = lun_acl;
416 deve->mapped_lun = mapped_lun;
417 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
418 }
419
420 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
423 } else {
424 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
425 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
426 }
427
428 if (trans) {
429 spin_unlock_irq(&nacl->device_list_lock);
430 return 0;
431 }
432 deve->creation_time = get_jiffies_64();
433 deve->attach_count++;
434 spin_unlock_irq(&nacl->device_list_lock);
435
436 spin_lock_bh(&port->sep_alua_lock);
437 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
438 spin_unlock_bh(&port->sep_alua_lock);
439
440 return 0;
441 }
442 /*
443 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
444 * PR operation to complete.
445 */
446 spin_unlock_irq(&nacl->device_list_lock);
447 while (atomic_read(&deve->pr_ref_count) != 0)
448 cpu_relax();
449 spin_lock_irq(&nacl->device_list_lock);
450 /*
451 * Disable struct se_dev_entry LUN ACL mapping
452 */
453 core_scsi3_ua_release_all(deve);
454 deve->se_lun = NULL;
455 deve->se_lun_acl = NULL;
456 deve->lun_flags = 0;
457 deve->creation_time = 0;
458 deve->attach_count--;
459 spin_unlock_irq(&nacl->device_list_lock);
460
461 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
462 return 0;
463}
464
465/* core_clear_lun_from_tpg():
466 *
467 *
468 */
469void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
470{
471 struct se_node_acl *nacl;
472 struct se_dev_entry *deve;
473 u32 i;
474
475 spin_lock_irq(&tpg->acl_node_lock);
476 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
477 spin_unlock_irq(&tpg->acl_node_lock);
478
479 spin_lock_irq(&nacl->device_list_lock);
480 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
481 deve = &nacl->device_list[i];
482 if (lun != deve->se_lun)
483 continue;
484 spin_unlock_irq(&nacl->device_list_lock);
485
486 core_update_device_list_for_node(lun, NULL,
487 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
488 nacl, tpg, 0);
489
490 spin_lock_irq(&nacl->device_list_lock);
491 }
492 spin_unlock_irq(&nacl->device_list_lock);
493
494 spin_lock_irq(&tpg->acl_node_lock);
495 }
496 spin_unlock_irq(&tpg->acl_node_lock);
497}
498
499static struct se_port *core_alloc_port(struct se_device *dev)
500{
501 struct se_port *port, *port_tmp;
502
503 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
504 if (!port) {
505 pr_err("Unable to allocate struct se_port\n");
506 return ERR_PTR(-ENOMEM);
507 }
508 INIT_LIST_HEAD(&port->sep_alua_list);
509 INIT_LIST_HEAD(&port->sep_list);
510 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
511 spin_lock_init(&port->sep_alua_lock);
512 mutex_init(&port->sep_tg_pt_md_mutex);
513
514 spin_lock(&dev->se_port_lock);
515 if (dev->dev_port_count == 0x0000ffff) {
516 pr_warn("Reached dev->dev_port_count =="
517 " 0x0000ffff\n");
518 spin_unlock(&dev->se_port_lock);
519 return ERR_PTR(-ENOSPC);
520 }
521again:
522 /*
523 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
524 * Here is the table from spc4r17 section 7.7.3.8.
525 *
526 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
527 *
528 * Code Description
529 * 0h Reserved
530 * 1h Relative port 1, historically known as port A
531 * 2h Relative port 2, historically known as port B
532 * 3h to FFFFh Relative port 3 through 65 535
533 */
534 port->sep_rtpi = dev->dev_rpti_counter++;
535 if (!port->sep_rtpi)
536 goto again;
537
538 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
539 /*
540 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
541 * for 16-bit wrap..
542 */
543 if (port->sep_rtpi == port_tmp->sep_rtpi)
544 goto again;
545 }
546 spin_unlock(&dev->se_port_lock);
547
548 return port;
549}
550
551static void core_export_port(
552 struct se_device *dev,
553 struct se_portal_group *tpg,
554 struct se_port *port,
555 struct se_lun *lun)
556{
557 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
558 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
559
560 spin_lock(&dev->se_port_lock);
561 spin_lock(&lun->lun_sep_lock);
562 port->sep_tpg = tpg;
563 port->sep_lun = lun;
564 lun->lun_sep = port;
565 spin_unlock(&lun->lun_sep_lock);
566
567 list_add_tail(&port->sep_list, &dev->dev_sep_list);
568 spin_unlock(&dev->se_port_lock);
569
570 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
571 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
572 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
573 pr_err("Unable to allocate t10_alua_tg_pt"
574 "_gp_member_t\n");
575 return;
576 }
577 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
578 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
579 su_dev->t10_alua.default_tg_pt_gp);
580 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
581 pr_debug("%s/%s: Adding to default ALUA Target Port"
582 " Group: alua/default_tg_pt_gp\n",
583 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
584 }
585
586 dev->dev_port_count++;
587 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
588}
589
590/*
591 * Called with struct se_device->se_port_lock spinlock held.
592 */
593static void core_release_port(struct se_device *dev, struct se_port *port)
594 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
595{
596 /*
597 * Wait for any port reference for PR ALL_TG_PT=1 operation
598 * to complete in __core_scsi3_alloc_registration()
599 */
600 spin_unlock(&dev->se_port_lock);
601 if (atomic_read(&port->sep_tg_pt_ref_cnt))
602 cpu_relax();
603 spin_lock(&dev->se_port_lock);
604
605 core_alua_free_tg_pt_gp_mem(port);
606
607 list_del(&port->sep_list);
608 dev->dev_port_count--;
609 kfree(port);
610}
611
612int core_dev_export(
613 struct se_device *dev,
614 struct se_portal_group *tpg,
615 struct se_lun *lun)
616{
617 struct se_port *port;
618
619 port = core_alloc_port(dev);
620 if (IS_ERR(port))
621 return PTR_ERR(port);
622
623 lun->lun_se_dev = dev;
624 se_dev_start(dev);
625
626 atomic_inc(&dev->dev_export_obj.obj_access_count);
627 core_export_port(dev, tpg, port, lun);
628 return 0;
629}
630
631void core_dev_unexport(
632 struct se_device *dev,
633 struct se_portal_group *tpg,
634 struct se_lun *lun)
635{
636 struct se_port *port = lun->lun_sep;
637
638 spin_lock(&lun->lun_sep_lock);
639 if (lun->lun_se_dev == NULL) {
640 spin_unlock(&lun->lun_sep_lock);
641 return;
642 }
643 spin_unlock(&lun->lun_sep_lock);
644
645 spin_lock(&dev->se_port_lock);
646 atomic_dec(&dev->dev_export_obj.obj_access_count);
647 core_release_port(dev, port);
648 spin_unlock(&dev->se_port_lock);
649
650 se_dev_stop(dev);
651 lun->lun_se_dev = NULL;
652}
653
654int transport_core_report_lun_response(struct se_cmd *se_cmd)
655{
656 struct se_dev_entry *deve;
657 struct se_lun *se_lun;
658 struct se_session *se_sess = se_cmd->se_sess;
659 struct se_task *se_task;
660 unsigned char *buf;
661 u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
662
663 list_for_each_entry(se_task, &se_cmd->t_task_list, t_list)
664 break;
665
666 if (!se_task) {
667 pr_err("Unable to locate struct se_task for struct se_cmd\n");
668 return PYX_TRANSPORT_LU_COMM_FAILURE;
669 }
670
671 buf = transport_kmap_first_data_page(se_cmd);
672
673 /*
674 * If no struct se_session pointer is present, this struct se_cmd is
675 * coming via a target_core_mod PASSTHROUGH op, and not through
676 * a $FABRIC_MOD. In that case, report LUN=0 only.
677 */
678 if (!se_sess) {
679 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
680 lun_count = 1;
681 goto done;
682 }
683
684 spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
685 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
686 deve = &se_sess->se_node_acl->device_list[i];
687 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
688 continue;
689 se_lun = deve->se_lun;
690 /*
691 * We determine the correct LUN LIST LENGTH even once we
692 * have reached the initial allocation length.
693 * See SPC2-R20 7.19.
694 */
695 lun_count++;
696 if ((cdb_offset + 8) >= se_cmd->data_length)
697 continue;
698
699 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
700 offset += 8;
701 cdb_offset += 8;
702 }
703 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
704
705 /*
706 * See SPC3 r07, page 159.
707 */
708done:
709 transport_kunmap_first_data_page(se_cmd);
710 lun_count *= 8;
711 buf[0] = ((lun_count >> 24) & 0xff);
712 buf[1] = ((lun_count >> 16) & 0xff);
713 buf[2] = ((lun_count >> 8) & 0xff);
714 buf[3] = (lun_count & 0xff);
715
716 return PYX_TRANSPORT_SENT_TO_TRANSPORT;
717}
718
719/* se_release_device_for_hba():
720 *
721 *
722 */
723void se_release_device_for_hba(struct se_device *dev)
724{
725 struct se_hba *hba = dev->se_hba;
726
727 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
728 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
729 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
730 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
731 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
732 se_dev_stop(dev);
733
734 if (dev->dev_ptr) {
735 kthread_stop(dev->process_thread);
736 if (dev->transport->free_device)
737 dev->transport->free_device(dev->dev_ptr);
738 }
739
740 spin_lock(&hba->device_lock);
741 list_del(&dev->dev_list);
742 hba->dev_count--;
743 spin_unlock(&hba->device_lock);
744
745 core_scsi3_free_all_registrations(dev);
746 se_release_vpd_for_dev(dev);
747
748 kfree(dev);
749}
750
751void se_release_vpd_for_dev(struct se_device *dev)
752{
753 struct t10_vpd *vpd, *vpd_tmp;
754
755 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
756 list_for_each_entry_safe(vpd, vpd_tmp,
757 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
758 list_del(&vpd->vpd_list);
759 kfree(vpd);
760 }
761 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
762}
763
764/* se_free_virtual_device():
765 *
766 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
767 */
768int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
769{
770 if (!list_empty(&dev->dev_sep_list))
771 dump_stack();
772
773 core_alua_free_lu_gp_mem(dev);
774 se_release_device_for_hba(dev);
775
776 return 0;
777}
778
779static void se_dev_start(struct se_device *dev)
780{
781 struct se_hba *hba = dev->se_hba;
782
783 spin_lock(&hba->device_lock);
784 atomic_inc(&dev->dev_obj.obj_access_count);
785 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
786 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
787 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
788 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
789 } else if (dev->dev_status &
790 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
791 dev->dev_status &=
792 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
793 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
794 }
795 }
796 spin_unlock(&hba->device_lock);
797}
798
799static void se_dev_stop(struct se_device *dev)
800{
801 struct se_hba *hba = dev->se_hba;
802
803 spin_lock(&hba->device_lock);
804 atomic_dec(&dev->dev_obj.obj_access_count);
805 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
806 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
807 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
808 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
809 } else if (dev->dev_status &
810 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
811 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
812 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
813 }
814 }
815 spin_unlock(&hba->device_lock);
816}
817
818int se_dev_check_online(struct se_device *dev)
819{
820 unsigned long flags;
821 int ret;
822
823 spin_lock_irqsave(&dev->dev_status_lock, flags);
824 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
825 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
826 spin_unlock_irqrestore(&dev->dev_status_lock, flags);
827
828 return ret;
829}
830
831int se_dev_check_shutdown(struct se_device *dev)
832{
833 int ret;
834
835 spin_lock_irq(&dev->dev_status_lock);
836 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
837 spin_unlock_irq(&dev->dev_status_lock);
838
839 return ret;
840}
841
842u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
843{
844 u32 tmp, aligned_max_sectors;
845 /*
846 * Limit max_sectors to a PAGE_SIZE aligned value for modern
847 * transport_allocate_data_tasks() operation.
848 */
849 tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
850 aligned_max_sectors = (tmp / block_size);
851 if (max_sectors != aligned_max_sectors) {
852 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
853 " to %u\n", max_sectors, aligned_max_sectors);
854 return aligned_max_sectors;
855 }
856
857 return max_sectors;
858}
859
860void se_dev_set_default_attribs(
861 struct se_device *dev,
862 struct se_dev_limits *dev_limits)
863{
864 struct queue_limits *limits = &dev_limits->limits;
865
866 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
867 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
868 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
869 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
870 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
871 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
872 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
873 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
874 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
875 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
876 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
877 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
878 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
879 /*
880 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
881 * iblock_create_virtdevice() from struct queue_limits values
882 * if blk_queue_discard()==1
883 */
884 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
885 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
886 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
887 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
888 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
889 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
890 /*
891 * block_size is based on subsystem plugin dependent requirements.
892 */
893 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
894 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
895 /*
896 * max_sectors is based on subsystem plugin dependent requirements.
897 */
898 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
899 /*
900 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
901 */
902 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
903 limits->logical_block_size);
904 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
905 /*
906 * Set optimal_sectors from max_sectors, which can be lowered via
907 * configfs.
908 */
909 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors;
910 /*
911 * queue_depth is based on subsystem plugin dependent requirements.
912 */
913 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
914 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
915}
916
917int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
918{
919 if (task_timeout > DA_TASK_TIMEOUT_MAX) {
920 pr_err("dev[%p]: Passed task_timeout: %u larger then"
921 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
922 return -EINVAL;
923 } else {
924 dev->se_sub_dev->se_dev_attrib.task_timeout = task_timeout;
925 pr_debug("dev[%p]: Set SE Device task_timeout: %u\n",
926 dev, task_timeout);
927 }
928
929 return 0;
930}
931
932int se_dev_set_max_unmap_lba_count(
933 struct se_device *dev,
934 u32 max_unmap_lba_count)
935{
936 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
937 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
938 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
939 return 0;
940}
941
942int se_dev_set_max_unmap_block_desc_count(
943 struct se_device *dev,
944 u32 max_unmap_block_desc_count)
945{
946 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
947 max_unmap_block_desc_count;
948 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
949 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
950 return 0;
951}
952
953int se_dev_set_unmap_granularity(
954 struct se_device *dev,
955 u32 unmap_granularity)
956{
957 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
958 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
959 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
960 return 0;
961}
962
963int se_dev_set_unmap_granularity_alignment(
964 struct se_device *dev,
965 u32 unmap_granularity_alignment)
966{
967 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
968 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
969 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
970 return 0;
971}
972
973int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
974{
975 if ((flag != 0) && (flag != 1)) {
976 pr_err("Illegal value %d\n", flag);
977 return -EINVAL;
978 }
979 if (dev->transport->dpo_emulated == NULL) {
980 pr_err("dev->transport->dpo_emulated is NULL\n");
981 return -EINVAL;
982 }
983 if (dev->transport->dpo_emulated(dev) == 0) {
984 pr_err("dev->transport->dpo_emulated not supported\n");
985 return -EINVAL;
986 }
987 dev->se_sub_dev->se_dev_attrib.emulate_dpo = flag;
988 pr_debug("dev[%p]: SE Device Page Out (DPO) Emulation"
989 " bit: %d\n", dev, dev->se_sub_dev->se_dev_attrib.emulate_dpo);
990 return 0;
991}
992
993int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
994{
995 if ((flag != 0) && (flag != 1)) {
996 pr_err("Illegal value %d\n", flag);
997 return -EINVAL;
998 }
999 if (dev->transport->fua_write_emulated == NULL) {
1000 pr_err("dev->transport->fua_write_emulated is NULL\n");
1001 return -EINVAL;
1002 }
1003 if (dev->transport->fua_write_emulated(dev) == 0) {
1004 pr_err("dev->transport->fua_write_emulated not supported\n");
1005 return -EINVAL;
1006 }
1007 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
1008 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
1009 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
1010 return 0;
1011}
1012
1013int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
1014{
1015 if ((flag != 0) && (flag != 1)) {
1016 pr_err("Illegal value %d\n", flag);
1017 return -EINVAL;
1018 }
1019 if (dev->transport->fua_read_emulated == NULL) {
1020 pr_err("dev->transport->fua_read_emulated is NULL\n");
1021 return -EINVAL;
1022 }
1023 if (dev->transport->fua_read_emulated(dev) == 0) {
1024 pr_err("dev->transport->fua_read_emulated not supported\n");
1025 return -EINVAL;
1026 }
1027 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = flag;
1028 pr_debug("dev[%p]: SE Device Forced Unit Access READs: %d\n",
1029 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_read);
1030 return 0;
1031}
1032
1033int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1034{
1035 if ((flag != 0) && (flag != 1)) {
1036 pr_err("Illegal value %d\n", flag);
1037 return -EINVAL;
1038 }
1039 if (dev->transport->write_cache_emulated == NULL) {
1040 pr_err("dev->transport->write_cache_emulated is NULL\n");
1041 return -EINVAL;
1042 }
1043 if (dev->transport->write_cache_emulated(dev) == 0) {
1044 pr_err("dev->transport->write_cache_emulated not supported\n");
1045 return -EINVAL;
1046 }
1047 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1048 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1049 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1050 return 0;
1051}
1052
1053int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1054{
1055 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1056 pr_err("Illegal value %d\n", flag);
1057 return -EINVAL;
1058 }
1059
1060 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1061 pr_err("dev[%p]: Unable to change SE Device"
1062 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1063 " exists\n", dev,
1064 atomic_read(&dev->dev_export_obj.obj_access_count));
1065 return -EINVAL;
1066 }
1067 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1068 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1069 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1070
1071 return 0;
1072}
1073
1074int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1075{
1076 if ((flag != 0) && (flag != 1)) {
1077 pr_err("Illegal value %d\n", flag);
1078 return -EINVAL;
1079 }
1080
1081 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1082 pr_err("dev[%p]: Unable to change SE Device TAS while"
1083 " dev_export_obj: %d count exists\n", dev,
1084 atomic_read(&dev->dev_export_obj.obj_access_count));
1085 return -EINVAL;
1086 }
1087 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1088 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1089 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1090
1091 return 0;
1092}
1093
1094int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1095{
1096 if ((flag != 0) && (flag != 1)) {
1097 pr_err("Illegal value %d\n", flag);
1098 return -EINVAL;
1099 }
1100 /*
1101 * We expect this value to be non-zero when generic Block Layer
1102 * Discard supported is detected iblock_create_virtdevice().
1103 */
1104 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1105 pr_err("Generic Block Discard not supported\n");
1106 return -ENOSYS;
1107 }
1108
1109 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1110 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1111 dev, flag);
1112 return 0;
1113}
1114
1115int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1116{
1117 if ((flag != 0) && (flag != 1)) {
1118 pr_err("Illegal value %d\n", flag);
1119 return -EINVAL;
1120 }
1121 /*
1122 * We expect this value to be non-zero when generic Block Layer
1123 * Discard supported is detected iblock_create_virtdevice().
1124 */
1125 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1126 pr_err("Generic Block Discard not supported\n");
1127 return -ENOSYS;
1128 }
1129
1130 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1131 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1132 dev, flag);
1133 return 0;
1134}
1135
1136int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1137{
1138 if ((flag != 0) && (flag != 1)) {
1139 pr_err("Illegal value %d\n", flag);
1140 return -EINVAL;
1141 }
1142 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1143 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1144 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1145 return 0;
1146}
1147
1148int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1149{
1150 if ((flag != 0) && (flag != 1)) {
1151 printk(KERN_ERR "Illegal value %d\n", flag);
1152 return -EINVAL;
1153 }
1154 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1155 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1156 dev, flag);
1157 return 0;
1158}
1159
1160int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1161{
1162 if (flag != 0) {
1163 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1164 " reordering not implemented\n", dev);
1165 return -ENOSYS;
1166 }
1167 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1168 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1169 return 0;
1170}
1171
1172/*
1173 * Note, this can only be called on unexported SE Device Object.
1174 */
1175int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1176{
1177 u32 orig_queue_depth = dev->queue_depth;
1178
1179 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1180 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1181 " dev_export_obj: %d count exists\n", dev,
1182 atomic_read(&dev->dev_export_obj.obj_access_count));
1183 return -EINVAL;
1184 }
1185 if (!queue_depth) {
1186 pr_err("dev[%p]: Illegal ZERO value for queue"
1187 "_depth\n", dev);
1188 return -EINVAL;
1189 }
1190
1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1192 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1193 pr_err("dev[%p]: Passed queue_depth: %u"
1194 " exceeds TCM/SE_Device TCQ: %u\n",
1195 dev, queue_depth,
1196 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1197 return -EINVAL;
1198 }
1199 } else {
1200 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1201 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1202 pr_err("dev[%p]: Passed queue_depth:"
1203 " %u exceeds TCM/SE_Device MAX"
1204 " TCQ: %u\n", dev, queue_depth,
1205 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1206 return -EINVAL;
1207 }
1208 }
1209 }
1210
1211 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1212 if (queue_depth > orig_queue_depth)
1213 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1214 else if (queue_depth < orig_queue_depth)
1215 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1216
1217 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1218 dev, queue_depth);
1219 return 0;
1220}
1221
1222int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1223{
1224 int force = 0; /* Force setting for VDEVS */
1225
1226 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1227 pr_err("dev[%p]: Unable to change SE Device"
1228 " max_sectors while dev_export_obj: %d count exists\n",
1229 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1230 return -EINVAL;
1231 }
1232 if (!max_sectors) {
1233 pr_err("dev[%p]: Illegal ZERO value for"
1234 " max_sectors\n", dev);
1235 return -EINVAL;
1236 }
1237 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1238 pr_err("dev[%p]: Passed max_sectors: %u less than"
1239 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1240 DA_STATUS_MAX_SECTORS_MIN);
1241 return -EINVAL;
1242 }
1243 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1244 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1245 pr_err("dev[%p]: Passed max_sectors: %u"
1246 " greater than TCM/SE_Device max_sectors:"
1247 " %u\n", dev, max_sectors,
1248 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1249 return -EINVAL;
1250 }
1251 } else {
1252 if (!force && (max_sectors >
1253 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1254 pr_err("dev[%p]: Passed max_sectors: %u"
1255 " greater than TCM/SE_Device max_sectors"
1256 ": %u, use force=1 to override.\n", dev,
1257 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1258 return -EINVAL;
1259 }
1260 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1261 pr_err("dev[%p]: Passed max_sectors: %u"
1262 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1263 " %u\n", dev, max_sectors,
1264 DA_STATUS_MAX_SECTORS_MAX);
1265 return -EINVAL;
1266 }
1267 }
1268 /*
1269 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1270 */
1271 max_sectors = se_dev_align_max_sectors(max_sectors,
1272 dev->se_sub_dev->se_dev_attrib.block_size);
1273
1274 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1275 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1276 dev, max_sectors);
1277 return 0;
1278}
1279
1280int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1281{
1282 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1283 pr_err("dev[%p]: Unable to change SE Device"
1284 " optimal_sectors while dev_export_obj: %d count exists\n",
1285 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1286 return -EINVAL;
1287 }
1288 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1289 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1290 " changed for TCM/pSCSI\n", dev);
1291 return -EINVAL;
1292 }
1293 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) {
1294 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1295 " greater than max_sectors: %u\n", dev,
1296 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors);
1297 return -EINVAL;
1298 }
1299
1300 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1301 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1302 dev, optimal_sectors);
1303 return 0;
1304}
1305
1306int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1307{
1308 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1309 pr_err("dev[%p]: Unable to change SE Device block_size"
1310 " while dev_export_obj: %d count exists\n", dev,
1311 atomic_read(&dev->dev_export_obj.obj_access_count));
1312 return -EINVAL;
1313 }
1314
1315 if ((block_size != 512) &&
1316 (block_size != 1024) &&
1317 (block_size != 2048) &&
1318 (block_size != 4096)) {
1319 pr_err("dev[%p]: Illegal value for block_device: %u"
1320 " for SE device, must be 512, 1024, 2048 or 4096\n",
1321 dev, block_size);
1322 return -EINVAL;
1323 }
1324
1325 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1326 pr_err("dev[%p]: Not allowed to change block_size for"
1327 " Physical Device, use for Linux/SCSI to change"
1328 " block_size for underlying hardware\n", dev);
1329 return -EINVAL;
1330 }
1331
1332 dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1333 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1334 dev, block_size);
1335 return 0;
1336}
1337
1338struct se_lun *core_dev_add_lun(
1339 struct se_portal_group *tpg,
1340 struct se_hba *hba,
1341 struct se_device *dev,
1342 u32 lun)
1343{
1344 struct se_lun *lun_p;
1345 u32 lun_access = 0;
1346
1347 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1348 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1349 atomic_read(&dev->dev_access_obj.obj_access_count));
1350 return NULL;
1351 }
1352
1353 lun_p = core_tpg_pre_addlun(tpg, lun);
1354 if ((IS_ERR(lun_p)) || !lun_p)
1355 return NULL;
1356
1357 if (dev->dev_flags & DF_READ_ONLY)
1358 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1359 else
1360 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1361
1362 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1363 return NULL;
1364
1365 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1366 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1367 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1368 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1369 /*
1370 * Update LUN maps for dynamically added initiators when
1371 * generate_node_acl is enabled.
1372 */
1373 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1374 struct se_node_acl *acl;
1375 spin_lock_irq(&tpg->acl_node_lock);
1376 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1377 if (acl->dynamic_node_acl &&
1378 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1379 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1380 spin_unlock_irq(&tpg->acl_node_lock);
1381 core_tpg_add_node_to_devs(acl, tpg);
1382 spin_lock_irq(&tpg->acl_node_lock);
1383 }
1384 }
1385 spin_unlock_irq(&tpg->acl_node_lock);
1386 }
1387
1388 return lun_p;
1389}
1390
1391/* core_dev_del_lun():
1392 *
1393 *
1394 */
1395int core_dev_del_lun(
1396 struct se_portal_group *tpg,
1397 u32 unpacked_lun)
1398{
1399 struct se_lun *lun;
1400 int ret = 0;
1401
1402 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1403 if (!lun)
1404 return ret;
1405
1406 core_tpg_post_dellun(tpg, lun);
1407
1408 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1409 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1410 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1411 tpg->se_tpg_tfo->get_fabric_name());
1412
1413 return 0;
1414}
1415
1416struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1417{
1418 struct se_lun *lun;
1419
1420 spin_lock(&tpg->tpg_lun_lock);
1421 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1422 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1423 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1424 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1425 TRANSPORT_MAX_LUNS_PER_TPG-1,
1426 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1427 spin_unlock(&tpg->tpg_lun_lock);
1428 return NULL;
1429 }
1430 lun = &tpg->tpg_lun_list[unpacked_lun];
1431
1432 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1433 pr_err("%s Logical Unit Number: %u is not free on"
1434 " Target Portal Group: %hu, ignoring request.\n",
1435 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1436 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1437 spin_unlock(&tpg->tpg_lun_lock);
1438 return NULL;
1439 }
1440 spin_unlock(&tpg->tpg_lun_lock);
1441
1442 return lun;
1443}
1444
1445/* core_dev_get_lun():
1446 *
1447 *
1448 */
1449static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1450{
1451 struct se_lun *lun;
1452
1453 spin_lock(&tpg->tpg_lun_lock);
1454 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1455 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1456 "_TPG-1: %u for Target Portal Group: %hu\n",
1457 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1458 TRANSPORT_MAX_LUNS_PER_TPG-1,
1459 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1460 spin_unlock(&tpg->tpg_lun_lock);
1461 return NULL;
1462 }
1463 lun = &tpg->tpg_lun_list[unpacked_lun];
1464
1465 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1466 pr_err("%s Logical Unit Number: %u is not active on"
1467 " Target Portal Group: %hu, ignoring request.\n",
1468 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1469 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1470 spin_unlock(&tpg->tpg_lun_lock);
1471 return NULL;
1472 }
1473 spin_unlock(&tpg->tpg_lun_lock);
1474
1475 return lun;
1476}
1477
1478struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1479 struct se_portal_group *tpg,
1480 u32 mapped_lun,
1481 char *initiatorname,
1482 int *ret)
1483{
1484 struct se_lun_acl *lacl;
1485 struct se_node_acl *nacl;
1486
1487 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1488 pr_err("%s InitiatorName exceeds maximum size.\n",
1489 tpg->se_tpg_tfo->get_fabric_name());
1490 *ret = -EOVERFLOW;
1491 return NULL;
1492 }
1493 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1494 if (!nacl) {
1495 *ret = -EINVAL;
1496 return NULL;
1497 }
1498 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1499 if (!lacl) {
1500 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1501 *ret = -ENOMEM;
1502 return NULL;
1503 }
1504
1505 INIT_LIST_HEAD(&lacl->lacl_list);
1506 lacl->mapped_lun = mapped_lun;
1507 lacl->se_lun_nacl = nacl;
1508 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1509
1510 return lacl;
1511}
1512
1513int core_dev_add_initiator_node_lun_acl(
1514 struct se_portal_group *tpg,
1515 struct se_lun_acl *lacl,
1516 u32 unpacked_lun,
1517 u32 lun_access)
1518{
1519 struct se_lun *lun;
1520 struct se_node_acl *nacl;
1521
1522 lun = core_dev_get_lun(tpg, unpacked_lun);
1523 if (!lun) {
1524 pr_err("%s Logical Unit Number: %u is not active on"
1525 " Target Portal Group: %hu, ignoring request.\n",
1526 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1527 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1528 return -EINVAL;
1529 }
1530
1531 nacl = lacl->se_lun_nacl;
1532 if (!nacl)
1533 return -EINVAL;
1534
1535 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1536 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1537 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1538
1539 lacl->se_lun = lun;
1540
1541 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1542 lun_access, nacl, tpg, 1) < 0)
1543 return -EINVAL;
1544
1545 spin_lock(&lun->lun_acl_lock);
1546 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1547 atomic_inc(&lun->lun_acl_count);
1548 smp_mb__after_atomic_inc();
1549 spin_unlock(&lun->lun_acl_lock);
1550
1551 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1552 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1553 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1554 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1555 lacl->initiatorname);
1556 /*
1557 * Check to see if there are any existing persistent reservation APTPL
1558 * pre-registrations that need to be enabled for this LUN ACL..
1559 */
1560 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1561 return 0;
1562}
1563
1564/* core_dev_del_initiator_node_lun_acl():
1565 *
1566 *
1567 */
1568int core_dev_del_initiator_node_lun_acl(
1569 struct se_portal_group *tpg,
1570 struct se_lun *lun,
1571 struct se_lun_acl *lacl)
1572{
1573 struct se_node_acl *nacl;
1574
1575 nacl = lacl->se_lun_nacl;
1576 if (!nacl)
1577 return -EINVAL;
1578
1579 spin_lock(&lun->lun_acl_lock);
1580 list_del(&lacl->lacl_list);
1581 atomic_dec(&lun->lun_acl_count);
1582 smp_mb__after_atomic_dec();
1583 spin_unlock(&lun->lun_acl_lock);
1584
1585 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1586 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1587
1588 lacl->se_lun = NULL;
1589
1590 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1591 " InitiatorNode: %s Mapped LUN: %u\n",
1592 tpg->se_tpg_tfo->get_fabric_name(),
1593 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1594 lacl->initiatorname, lacl->mapped_lun);
1595
1596 return 0;
1597}
1598
1599void core_dev_free_initiator_node_lun_acl(
1600 struct se_portal_group *tpg,
1601 struct se_lun_acl *lacl)
1602{
1603 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1604 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1605 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1606 tpg->se_tpg_tfo->get_fabric_name(),
1607 lacl->initiatorname, lacl->mapped_lun);
1608
1609 kfree(lacl);
1610}
1611
1612int core_dev_setup_virtual_lun0(void)
1613{
1614 struct se_hba *hba;
1615 struct se_device *dev;
1616 struct se_subsystem_dev *se_dev = NULL;
1617 struct se_subsystem_api *t;
1618 char buf[16];
1619 int ret;
1620
1621 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1622 if (IS_ERR(hba))
1623 return PTR_ERR(hba);
1624
1625 lun0_hba = hba;
1626 t = hba->transport;
1627
1628 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1629 if (!se_dev) {
1630 pr_err("Unable to allocate memory for"
1631 " struct se_subsystem_dev\n");
1632 ret = -ENOMEM;
1633 goto out;
1634 }
1635 INIT_LIST_HEAD(&se_dev->se_dev_node);
1636 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1637 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1638 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1639 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1640 spin_lock_init(&se_dev->t10_pr.registration_lock);
1641 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1642 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1643 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1644 spin_lock_init(&se_dev->se_dev_lock);
1645 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1646 se_dev->t10_wwn.t10_sub_dev = se_dev;
1647 se_dev->t10_alua.t10_sub_dev = se_dev;
1648 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1649 se_dev->se_dev_hba = hba;
1650
1651 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1652 if (!se_dev->se_dev_su_ptr) {
1653 pr_err("Unable to locate subsystem dependent pointer"
1654 " from allocate_virtdevice()\n");
1655 ret = -ENOMEM;
1656 goto out;
1657 }
1658 lun0_su_dev = se_dev;
1659
1660 memset(buf, 0, 16);
1661 sprintf(buf, "rd_pages=8");
1662 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1663
1664 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1665 if (IS_ERR(dev)) {
1666 ret = PTR_ERR(dev);
1667 goto out;
1668 }
1669 se_dev->se_dev_ptr = dev;
1670 g_lun0_dev = dev;
1671
1672 return 0;
1673out:
1674 lun0_su_dev = NULL;
1675 kfree(se_dev);
1676 if (lun0_hba) {
1677 core_delete_hba(lun0_hba);
1678 lun0_hba = NULL;
1679 }
1680 return ret;
1681}
1682
1683
1684void core_dev_release_virtual_lun0(void)
1685{
1686 struct se_hba *hba = lun0_hba;
1687 struct se_subsystem_dev *su_dev = lun0_su_dev;
1688
1689 if (!hba)
1690 return;
1691
1692 if (g_lun0_dev)
1693 se_free_virtual_device(g_lun0_dev, hba);
1694
1695 kfree(su_dev);
1696 core_delete_hba(hba);
1697}
1/*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
4 * This file contains the TCM Virtual Device and Disk Transport
5 * agnostic related functions.
6 *
7 * (c) Copyright 2003-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 *
25 ******************************************************************************/
26
27#include <linux/net.h>
28#include <linux/string.h>
29#include <linux/delay.h>
30#include <linux/timer.h>
31#include <linux/slab.h>
32#include <linux/spinlock.h>
33#include <linux/kthread.h>
34#include <linux/in.h>
35#include <linux/export.h>
36#include <net/sock.h>
37#include <net/tcp.h>
38#include <scsi/scsi.h>
39#include <scsi/scsi_device.h>
40
41#include <target/target_core_base.h>
42#include <target/target_core_backend.h>
43#include <target/target_core_fabric.h>
44
45#include "target_core_internal.h"
46#include "target_core_alua.h"
47#include "target_core_pr.h"
48#include "target_core_ua.h"
49
50DEFINE_MUTEX(g_device_mutex);
51LIST_HEAD(g_device_list);
52
53static struct se_hba *lun0_hba;
54/* not static, needed by tpg.c */
55struct se_device *g_lun0_dev;
56
57sense_reason_t
58transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
59{
60 struct se_lun *se_lun = NULL;
61 struct se_session *se_sess = se_cmd->se_sess;
62 struct se_device *dev;
63 unsigned long flags;
64
65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
66 return TCM_NON_EXISTENT_LUN;
67
68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
71 struct se_dev_entry *deve = se_cmd->se_deve;
72
73 deve->total_cmds++;
74
75 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
78 " Access for 0x%08x\n",
79 se_cmd->se_tfo->get_fabric_name(),
80 unpacked_lun);
81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
82 return TCM_WRITE_PROTECTED;
83 }
84
85 if (se_cmd->data_direction == DMA_TO_DEVICE)
86 deve->write_bytes += se_cmd->data_length;
87 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
88 deve->read_bytes += se_cmd->data_length;
89
90 se_lun = deve->se_lun;
91 se_cmd->se_lun = deve->se_lun;
92 se_cmd->pr_res_key = deve->pr_res_key;
93 se_cmd->orig_fe_lun = unpacked_lun;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
95
96 percpu_ref_get(&se_lun->lun_ref);
97 se_cmd->lun_ref_active = true;
98 }
99 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
100
101 if (!se_lun) {
102 /*
103 * Use the se_portal_group->tpg_virt_lun0 to allow for
104 * REPORT_LUNS, et al to be returned when no active
105 * MappedLUN=0 exists for this Initiator Port.
106 */
107 if (unpacked_lun != 0) {
108 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
109 " Access for 0x%08x\n",
110 se_cmd->se_tfo->get_fabric_name(),
111 unpacked_lun);
112 return TCM_NON_EXISTENT_LUN;
113 }
114 /*
115 * Force WRITE PROTECT for virtual LUN 0
116 */
117 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
118 (se_cmd->data_direction != DMA_NONE))
119 return TCM_WRITE_PROTECTED;
120
121 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
122 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
123 se_cmd->orig_fe_lun = 0;
124 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
125
126 percpu_ref_get(&se_lun->lun_ref);
127 se_cmd->lun_ref_active = true;
128 }
129
130 /* Directly associate cmd with se_dev */
131 se_cmd->se_dev = se_lun->lun_se_dev;
132
133 dev = se_lun->lun_se_dev;
134 atomic_long_inc(&dev->num_cmds);
135 if (se_cmd->data_direction == DMA_TO_DEVICE)
136 atomic_long_add(se_cmd->data_length, &dev->write_bytes);
137 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
138 atomic_long_add(se_cmd->data_length, &dev->read_bytes);
139
140 return 0;
141}
142EXPORT_SYMBOL(transport_lookup_cmd_lun);
143
144int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
145{
146 struct se_dev_entry *deve;
147 struct se_lun *se_lun = NULL;
148 struct se_session *se_sess = se_cmd->se_sess;
149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
150 unsigned long flags;
151
152 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
153 return -ENODEV;
154
155 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
156 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
157 deve = se_cmd->se_deve;
158
159 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
160 se_tmr->tmr_lun = deve->se_lun;
161 se_cmd->se_lun = deve->se_lun;
162 se_lun = deve->se_lun;
163 se_cmd->pr_res_key = deve->pr_res_key;
164 se_cmd->orig_fe_lun = unpacked_lun;
165 }
166 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
167
168 if (!se_lun) {
169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
170 " Access for 0x%08x\n",
171 se_cmd->se_tfo->get_fabric_name(),
172 unpacked_lun);
173 return -ENODEV;
174 }
175
176 /* Directly associate cmd with se_dev */
177 se_cmd->se_dev = se_lun->lun_se_dev;
178 se_tmr->tmr_dev = se_lun->lun_se_dev;
179
180 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
181 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
182 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
183
184 return 0;
185}
186EXPORT_SYMBOL(transport_lookup_tmr_lun);
187
188/*
189 * This function is called from core_scsi3_emulate_pro_register_and_move()
190 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
191 * when a matching rtpi is found.
192 */
193struct se_dev_entry *core_get_se_deve_from_rtpi(
194 struct se_node_acl *nacl,
195 u16 rtpi)
196{
197 struct se_dev_entry *deve;
198 struct se_lun *lun;
199 struct se_port *port;
200 struct se_portal_group *tpg = nacl->se_tpg;
201 u32 i;
202
203 spin_lock_irq(&nacl->device_list_lock);
204 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
205 deve = nacl->device_list[i];
206
207 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
208 continue;
209
210 lun = deve->se_lun;
211 if (!lun) {
212 pr_err("%s device entries device pointer is"
213 " NULL, but Initiator has access.\n",
214 tpg->se_tpg_tfo->get_fabric_name());
215 continue;
216 }
217 port = lun->lun_sep;
218 if (!port) {
219 pr_err("%s device entries device pointer is"
220 " NULL, but Initiator has access.\n",
221 tpg->se_tpg_tfo->get_fabric_name());
222 continue;
223 }
224 if (port->sep_rtpi != rtpi)
225 continue;
226
227 atomic_inc(&deve->pr_ref_count);
228 smp_mb__after_atomic_inc();
229 spin_unlock_irq(&nacl->device_list_lock);
230
231 return deve;
232 }
233 spin_unlock_irq(&nacl->device_list_lock);
234
235 return NULL;
236}
237
238int core_free_device_list_for_node(
239 struct se_node_acl *nacl,
240 struct se_portal_group *tpg)
241{
242 struct se_dev_entry *deve;
243 struct se_lun *lun;
244 u32 i;
245
246 if (!nacl->device_list)
247 return 0;
248
249 spin_lock_irq(&nacl->device_list_lock);
250 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
251 deve = nacl->device_list[i];
252
253 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
254 continue;
255
256 if (!deve->se_lun) {
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg->se_tpg_tfo->get_fabric_name());
260 continue;
261 }
262 lun = deve->se_lun;
263
264 spin_unlock_irq(&nacl->device_list_lock);
265 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
266 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
267 spin_lock_irq(&nacl->device_list_lock);
268 }
269 spin_unlock_irq(&nacl->device_list_lock);
270
271 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
272 nacl->device_list = NULL;
273
274 return 0;
275}
276
277void core_update_device_list_access(
278 u32 mapped_lun,
279 u32 lun_access,
280 struct se_node_acl *nacl)
281{
282 struct se_dev_entry *deve;
283
284 spin_lock_irq(&nacl->device_list_lock);
285 deve = nacl->device_list[mapped_lun];
286 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
287 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
288 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
289 } else {
290 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
291 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
292 }
293 spin_unlock_irq(&nacl->device_list_lock);
294}
295
296/* core_enable_device_list_for_node():
297 *
298 *
299 */
300int core_enable_device_list_for_node(
301 struct se_lun *lun,
302 struct se_lun_acl *lun_acl,
303 u32 mapped_lun,
304 u32 lun_access,
305 struct se_node_acl *nacl,
306 struct se_portal_group *tpg)
307{
308 struct se_port *port = lun->lun_sep;
309 struct se_dev_entry *deve;
310
311 spin_lock_irq(&nacl->device_list_lock);
312
313 deve = nacl->device_list[mapped_lun];
314
315 /*
316 * Check if the call is handling demo mode -> explicit LUN ACL
317 * transition. This transition must be for the same struct se_lun
318 * + mapped_lun that was setup in demo mode..
319 */
320 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
321 if (deve->se_lun_acl != NULL) {
322 pr_err("struct se_dev_entry->se_lun_acl"
323 " already set for demo mode -> explicit"
324 " LUN ACL transition\n");
325 spin_unlock_irq(&nacl->device_list_lock);
326 return -EINVAL;
327 }
328 if (deve->se_lun != lun) {
329 pr_err("struct se_dev_entry->se_lun does"
330 " match passed struct se_lun for demo mode"
331 " -> explicit LUN ACL transition\n");
332 spin_unlock_irq(&nacl->device_list_lock);
333 return -EINVAL;
334 }
335 deve->se_lun_acl = lun_acl;
336
337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
338 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
339 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
340 } else {
341 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
342 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
343 }
344
345 spin_unlock_irq(&nacl->device_list_lock);
346 return 0;
347 }
348
349 deve->se_lun = lun;
350 deve->se_lun_acl = lun_acl;
351 deve->mapped_lun = mapped_lun;
352 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
353
354 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
355 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
356 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
357 } else {
358 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
359 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
360 }
361
362 deve->creation_time = get_jiffies_64();
363 deve->attach_count++;
364 spin_unlock_irq(&nacl->device_list_lock);
365
366 spin_lock_bh(&port->sep_alua_lock);
367 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
368 spin_unlock_bh(&port->sep_alua_lock);
369
370 return 0;
371}
372
373/* core_disable_device_list_for_node():
374 *
375 *
376 */
377int core_disable_device_list_for_node(
378 struct se_lun *lun,
379 struct se_lun_acl *lun_acl,
380 u32 mapped_lun,
381 u32 lun_access,
382 struct se_node_acl *nacl,
383 struct se_portal_group *tpg)
384{
385 struct se_port *port = lun->lun_sep;
386 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
387
388 /*
389 * If the MappedLUN entry is being disabled, the entry in
390 * port->sep_alua_list must be removed now before clearing the
391 * struct se_dev_entry pointers below as logic in
392 * core_alua_do_transition_tg_pt() depends on these being present.
393 *
394 * deve->se_lun_acl will be NULL for demo-mode created LUNs
395 * that have not been explicitly converted to MappedLUNs ->
396 * struct se_lun_acl, but we remove deve->alua_port_list from
397 * port->sep_alua_list. This also means that active UAs and
398 * NodeACL context specific PR metadata for demo-mode
399 * MappedLUN *deve will be released below..
400 */
401 spin_lock_bh(&port->sep_alua_lock);
402 list_del(&deve->alua_port_list);
403 spin_unlock_bh(&port->sep_alua_lock);
404 /*
405 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
406 * PR operation to complete.
407 */
408 while (atomic_read(&deve->pr_ref_count) != 0)
409 cpu_relax();
410
411 spin_lock_irq(&nacl->device_list_lock);
412 /*
413 * Disable struct se_dev_entry LUN ACL mapping
414 */
415 core_scsi3_ua_release_all(deve);
416 deve->se_lun = NULL;
417 deve->se_lun_acl = NULL;
418 deve->lun_flags = 0;
419 deve->creation_time = 0;
420 deve->attach_count--;
421 spin_unlock_irq(&nacl->device_list_lock);
422
423 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
424 return 0;
425}
426
427/* core_clear_lun_from_tpg():
428 *
429 *
430 */
431void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
432{
433 struct se_node_acl *nacl;
434 struct se_dev_entry *deve;
435 u32 i;
436
437 spin_lock_irq(&tpg->acl_node_lock);
438 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
439 spin_unlock_irq(&tpg->acl_node_lock);
440
441 spin_lock_irq(&nacl->device_list_lock);
442 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
443 deve = nacl->device_list[i];
444 if (lun != deve->se_lun)
445 continue;
446 spin_unlock_irq(&nacl->device_list_lock);
447
448 core_disable_device_list_for_node(lun, NULL,
449 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
450 nacl, tpg);
451
452 spin_lock_irq(&nacl->device_list_lock);
453 }
454 spin_unlock_irq(&nacl->device_list_lock);
455
456 spin_lock_irq(&tpg->acl_node_lock);
457 }
458 spin_unlock_irq(&tpg->acl_node_lock);
459}
460
461static struct se_port *core_alloc_port(struct se_device *dev)
462{
463 struct se_port *port, *port_tmp;
464
465 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
466 if (!port) {
467 pr_err("Unable to allocate struct se_port\n");
468 return ERR_PTR(-ENOMEM);
469 }
470 INIT_LIST_HEAD(&port->sep_alua_list);
471 INIT_LIST_HEAD(&port->sep_list);
472 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
473 spin_lock_init(&port->sep_alua_lock);
474 mutex_init(&port->sep_tg_pt_md_mutex);
475
476 spin_lock(&dev->se_port_lock);
477 if (dev->dev_port_count == 0x0000ffff) {
478 pr_warn("Reached dev->dev_port_count =="
479 " 0x0000ffff\n");
480 spin_unlock(&dev->se_port_lock);
481 return ERR_PTR(-ENOSPC);
482 }
483again:
484 /*
485 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
486 * Here is the table from spc4r17 section 7.7.3.8.
487 *
488 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
489 *
490 * Code Description
491 * 0h Reserved
492 * 1h Relative port 1, historically known as port A
493 * 2h Relative port 2, historically known as port B
494 * 3h to FFFFh Relative port 3 through 65 535
495 */
496 port->sep_rtpi = dev->dev_rpti_counter++;
497 if (!port->sep_rtpi)
498 goto again;
499
500 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
501 /*
502 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
503 * for 16-bit wrap..
504 */
505 if (port->sep_rtpi == port_tmp->sep_rtpi)
506 goto again;
507 }
508 spin_unlock(&dev->se_port_lock);
509
510 return port;
511}
512
513static void core_export_port(
514 struct se_device *dev,
515 struct se_portal_group *tpg,
516 struct se_port *port,
517 struct se_lun *lun)
518{
519 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
520
521 spin_lock(&dev->se_port_lock);
522 spin_lock(&lun->lun_sep_lock);
523 port->sep_tpg = tpg;
524 port->sep_lun = lun;
525 lun->lun_sep = port;
526 spin_unlock(&lun->lun_sep_lock);
527
528 list_add_tail(&port->sep_list, &dev->dev_sep_list);
529 spin_unlock(&dev->se_port_lock);
530
531 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
532 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
533 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
534 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
535 pr_err("Unable to allocate t10_alua_tg_pt"
536 "_gp_member_t\n");
537 return;
538 }
539 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
540 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
541 dev->t10_alua.default_tg_pt_gp);
542 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
543 pr_debug("%s/%s: Adding to default ALUA Target Port"
544 " Group: alua/default_tg_pt_gp\n",
545 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
546 }
547
548 dev->dev_port_count++;
549 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
550}
551
552/*
553 * Called with struct se_device->se_port_lock spinlock held.
554 */
555static void core_release_port(struct se_device *dev, struct se_port *port)
556 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
557{
558 /*
559 * Wait for any port reference for PR ALL_TG_PT=1 operation
560 * to complete in __core_scsi3_alloc_registration()
561 */
562 spin_unlock(&dev->se_port_lock);
563 if (atomic_read(&port->sep_tg_pt_ref_cnt))
564 cpu_relax();
565 spin_lock(&dev->se_port_lock);
566
567 core_alua_free_tg_pt_gp_mem(port);
568
569 list_del(&port->sep_list);
570 dev->dev_port_count--;
571 kfree(port);
572}
573
574int core_dev_export(
575 struct se_device *dev,
576 struct se_portal_group *tpg,
577 struct se_lun *lun)
578{
579 struct se_hba *hba = dev->se_hba;
580 struct se_port *port;
581
582 port = core_alloc_port(dev);
583 if (IS_ERR(port))
584 return PTR_ERR(port);
585
586 lun->lun_se_dev = dev;
587
588 spin_lock(&hba->device_lock);
589 dev->export_count++;
590 spin_unlock(&hba->device_lock);
591
592 core_export_port(dev, tpg, port, lun);
593 return 0;
594}
595
596void core_dev_unexport(
597 struct se_device *dev,
598 struct se_portal_group *tpg,
599 struct se_lun *lun)
600{
601 struct se_hba *hba = dev->se_hba;
602 struct se_port *port = lun->lun_sep;
603
604 spin_lock(&lun->lun_sep_lock);
605 if (lun->lun_se_dev == NULL) {
606 spin_unlock(&lun->lun_sep_lock);
607 return;
608 }
609 spin_unlock(&lun->lun_sep_lock);
610
611 spin_lock(&dev->se_port_lock);
612 core_release_port(dev, port);
613 spin_unlock(&dev->se_port_lock);
614
615 spin_lock(&hba->device_lock);
616 dev->export_count--;
617 spin_unlock(&hba->device_lock);
618
619 lun->lun_se_dev = NULL;
620}
621
622static void se_release_vpd_for_dev(struct se_device *dev)
623{
624 struct t10_vpd *vpd, *vpd_tmp;
625
626 spin_lock(&dev->t10_wwn.t10_vpd_lock);
627 list_for_each_entry_safe(vpd, vpd_tmp,
628 &dev->t10_wwn.t10_vpd_list, vpd_list) {
629 list_del(&vpd->vpd_list);
630 kfree(vpd);
631 }
632 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
633}
634
635static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
636{
637 u32 aligned_max_sectors;
638 u32 alignment;
639 /*
640 * Limit max_sectors to a PAGE_SIZE aligned value for modern
641 * transport_allocate_data_tasks() operation.
642 */
643 alignment = max(1ul, PAGE_SIZE / block_size);
644 aligned_max_sectors = rounddown(max_sectors, alignment);
645
646 if (max_sectors != aligned_max_sectors)
647 pr_info("Rounding down aligned max_sectors from %u to %u\n",
648 max_sectors, aligned_max_sectors);
649
650 return aligned_max_sectors;
651}
652
653int se_dev_set_max_unmap_lba_count(
654 struct se_device *dev,
655 u32 max_unmap_lba_count)
656{
657 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
658 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
659 dev, dev->dev_attrib.max_unmap_lba_count);
660 return 0;
661}
662
663int se_dev_set_max_unmap_block_desc_count(
664 struct se_device *dev,
665 u32 max_unmap_block_desc_count)
666{
667 dev->dev_attrib.max_unmap_block_desc_count =
668 max_unmap_block_desc_count;
669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
670 dev, dev->dev_attrib.max_unmap_block_desc_count);
671 return 0;
672}
673
674int se_dev_set_unmap_granularity(
675 struct se_device *dev,
676 u32 unmap_granularity)
677{
678 dev->dev_attrib.unmap_granularity = unmap_granularity;
679 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
680 dev, dev->dev_attrib.unmap_granularity);
681 return 0;
682}
683
684int se_dev_set_unmap_granularity_alignment(
685 struct se_device *dev,
686 u32 unmap_granularity_alignment)
687{
688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
690 dev, dev->dev_attrib.unmap_granularity_alignment);
691 return 0;
692}
693
694int se_dev_set_max_write_same_len(
695 struct se_device *dev,
696 u32 max_write_same_len)
697{
698 dev->dev_attrib.max_write_same_len = max_write_same_len;
699 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
700 dev, dev->dev_attrib.max_write_same_len);
701 return 0;
702}
703
704static void dev_set_t10_wwn_model_alias(struct se_device *dev)
705{
706 const char *configname;
707
708 configname = config_item_name(&dev->dev_group.cg_item);
709 if (strlen(configname) >= 16) {
710 pr_warn("dev[%p]: Backstore name '%s' is too long for "
711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
712 configname);
713 }
714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
715}
716
717int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
718{
719 if (dev->export_count) {
720 pr_err("dev[%p]: Unable to change model alias"
721 " while export_count is %d\n",
722 dev, dev->export_count);
723 return -EINVAL;
724 }
725
726 if (flag != 0 && flag != 1) {
727 pr_err("Illegal value %d\n", flag);
728 return -EINVAL;
729 }
730
731 if (flag) {
732 dev_set_t10_wwn_model_alias(dev);
733 } else {
734 strncpy(&dev->t10_wwn.model[0],
735 dev->transport->inquiry_prod, 16);
736 }
737 dev->dev_attrib.emulate_model_alias = flag;
738
739 return 0;
740}
741
742int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
743{
744 if (flag != 0 && flag != 1) {
745 pr_err("Illegal value %d\n", flag);
746 return -EINVAL;
747 }
748
749 if (flag) {
750 pr_err("dpo_emulated not supported\n");
751 return -EINVAL;
752 }
753
754 return 0;
755}
756
757int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
758{
759 if (flag != 0 && flag != 1) {
760 pr_err("Illegal value %d\n", flag);
761 return -EINVAL;
762 }
763
764 if (flag &&
765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
766 pr_err("emulate_fua_write not supported for pSCSI\n");
767 return -EINVAL;
768 }
769 dev->dev_attrib.emulate_fua_write = flag;
770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
771 dev, dev->dev_attrib.emulate_fua_write);
772 return 0;
773}
774
775int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
776{
777 if (flag != 0 && flag != 1) {
778 pr_err("Illegal value %d\n", flag);
779 return -EINVAL;
780 }
781
782 if (flag) {
783 pr_err("ua read emulated not supported\n");
784 return -EINVAL;
785 }
786
787 return 0;
788}
789
790int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
791{
792 if (flag != 0 && flag != 1) {
793 pr_err("Illegal value %d\n", flag);
794 return -EINVAL;
795 }
796 if (flag &&
797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
798 pr_err("emulate_write_cache not supported for pSCSI\n");
799 return -EINVAL;
800 }
801 if (flag &&
802 dev->transport->get_write_cache) {
803 pr_err("emulate_write_cache not supported for this device\n");
804 return -EINVAL;
805 }
806
807 dev->dev_attrib.emulate_write_cache = flag;
808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
809 dev, dev->dev_attrib.emulate_write_cache);
810 return 0;
811}
812
813int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
814{
815 if ((flag != 0) && (flag != 1) && (flag != 2)) {
816 pr_err("Illegal value %d\n", flag);
817 return -EINVAL;
818 }
819
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device"
822 " UA_INTRLCK_CTRL while export_count is %d\n",
823 dev, dev->export_count);
824 return -EINVAL;
825 }
826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
829
830 return 0;
831}
832
833int se_dev_set_emulate_tas(struct se_device *dev, int flag)
834{
835 if ((flag != 0) && (flag != 1)) {
836 pr_err("Illegal value %d\n", flag);
837 return -EINVAL;
838 }
839
840 if (dev->export_count) {
841 pr_err("dev[%p]: Unable to change SE Device TAS while"
842 " export_count is %d\n",
843 dev, dev->export_count);
844 return -EINVAL;
845 }
846 dev->dev_attrib.emulate_tas = flag;
847 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
848 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
849
850 return 0;
851}
852
853int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
854{
855 if ((flag != 0) && (flag != 1)) {
856 pr_err("Illegal value %d\n", flag);
857 return -EINVAL;
858 }
859 /*
860 * We expect this value to be non-zero when generic Block Layer
861 * Discard supported is detected iblock_create_virtdevice().
862 */
863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
864 pr_err("Generic Block Discard not supported\n");
865 return -ENOSYS;
866 }
867
868 dev->dev_attrib.emulate_tpu = flag;
869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
870 dev, flag);
871 return 0;
872}
873
874int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
875{
876 if ((flag != 0) && (flag != 1)) {
877 pr_err("Illegal value %d\n", flag);
878 return -EINVAL;
879 }
880 /*
881 * We expect this value to be non-zero when generic Block Layer
882 * Discard supported is detected iblock_create_virtdevice().
883 */
884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
885 pr_err("Generic Block Discard not supported\n");
886 return -ENOSYS;
887 }
888
889 dev->dev_attrib.emulate_tpws = flag;
890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
891 dev, flag);
892 return 0;
893}
894
895int se_dev_set_emulate_caw(struct se_device *dev, int flag)
896{
897 if (flag != 0 && flag != 1) {
898 pr_err("Illegal value %d\n", flag);
899 return -EINVAL;
900 }
901 dev->dev_attrib.emulate_caw = flag;
902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
903 dev, flag);
904
905 return 0;
906}
907
908int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
909{
910 if (flag != 0 && flag != 1) {
911 pr_err("Illegal value %d\n", flag);
912 return -EINVAL;
913 }
914 dev->dev_attrib.emulate_3pc = flag;
915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
916 dev, flag);
917
918 return 0;
919}
920
921int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
922{
923 int rc, old_prot = dev->dev_attrib.pi_prot_type;
924
925 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
926 pr_err("Illegal value %d for pi_prot_type\n", flag);
927 return -EINVAL;
928 }
929 if (flag == 2) {
930 pr_err("DIF TYPE2 protection currently not supported\n");
931 return -ENOSYS;
932 }
933 if (dev->dev_attrib.hw_pi_prot_type) {
934 pr_warn("DIF protection enabled on underlying hardware,"
935 " ignoring\n");
936 return 0;
937 }
938 if (!dev->transport->init_prot || !dev->transport->free_prot) {
939 /* 0 is only allowed value for non-supporting backends */
940 if (flag == 0)
941 return 0;
942
943 pr_err("DIF protection not supported by backend: %s\n",
944 dev->transport->name);
945 return -ENOSYS;
946 }
947 if (!(dev->dev_flags & DF_CONFIGURED)) {
948 pr_err("DIF protection requires device to be configured\n");
949 return -ENODEV;
950 }
951 if (dev->export_count) {
952 pr_err("dev[%p]: Unable to change SE Device PROT type while"
953 " export_count is %d\n", dev, dev->export_count);
954 return -EINVAL;
955 }
956
957 dev->dev_attrib.pi_prot_type = flag;
958
959 if (flag && !old_prot) {
960 rc = dev->transport->init_prot(dev);
961 if (rc) {
962 dev->dev_attrib.pi_prot_type = old_prot;
963 return rc;
964 }
965
966 } else if (!flag && old_prot) {
967 dev->transport->free_prot(dev);
968 }
969 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
970
971 return 0;
972}
973
974int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
975{
976 int rc;
977
978 if (!flag)
979 return 0;
980
981 if (flag != 1) {
982 pr_err("Illegal value %d for pi_prot_format\n", flag);
983 return -EINVAL;
984 }
985 if (!dev->transport->format_prot) {
986 pr_err("DIF protection format not supported by backend %s\n",
987 dev->transport->name);
988 return -ENOSYS;
989 }
990 if (!(dev->dev_flags & DF_CONFIGURED)) {
991 pr_err("DIF protection format requires device to be configured\n");
992 return -ENODEV;
993 }
994 if (dev->export_count) {
995 pr_err("dev[%p]: Unable to format SE Device PROT type while"
996 " export_count is %d\n", dev, dev->export_count);
997 return -EINVAL;
998 }
999
1000 rc = dev->transport->format_prot(dev);
1001 if (rc)
1002 return rc;
1003
1004 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1005
1006 return 0;
1007}
1008
1009int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1010{
1011 if ((flag != 0) && (flag != 1)) {
1012 pr_err("Illegal value %d\n", flag);
1013 return -EINVAL;
1014 }
1015 dev->dev_attrib.enforce_pr_isids = flag;
1016 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1017 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1018 return 0;
1019}
1020
1021int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1022{
1023 if ((flag != 0) && (flag != 1)) {
1024 printk(KERN_ERR "Illegal value %d\n", flag);
1025 return -EINVAL;
1026 }
1027 dev->dev_attrib.is_nonrot = flag;
1028 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1029 dev, flag);
1030 return 0;
1031}
1032
1033int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1034{
1035 if (flag != 0) {
1036 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1037 " reordering not implemented\n", dev);
1038 return -ENOSYS;
1039 }
1040 dev->dev_attrib.emulate_rest_reord = flag;
1041 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1042 return 0;
1043}
1044
1045/*
1046 * Note, this can only be called on unexported SE Device Object.
1047 */
1048int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1049{
1050 if (dev->export_count) {
1051 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1052 " export_count is %d\n",
1053 dev, dev->export_count);
1054 return -EINVAL;
1055 }
1056 if (!queue_depth) {
1057 pr_err("dev[%p]: Illegal ZERO value for queue"
1058 "_depth\n", dev);
1059 return -EINVAL;
1060 }
1061
1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1063 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1064 pr_err("dev[%p]: Passed queue_depth: %u"
1065 " exceeds TCM/SE_Device TCQ: %u\n",
1066 dev, queue_depth,
1067 dev->dev_attrib.hw_queue_depth);
1068 return -EINVAL;
1069 }
1070 } else {
1071 if (queue_depth > dev->dev_attrib.queue_depth) {
1072 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1073 pr_err("dev[%p]: Passed queue_depth:"
1074 " %u exceeds TCM/SE_Device MAX"
1075 " TCQ: %u\n", dev, queue_depth,
1076 dev->dev_attrib.hw_queue_depth);
1077 return -EINVAL;
1078 }
1079 }
1080 }
1081
1082 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1083 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1084 dev, queue_depth);
1085 return 0;
1086}
1087
1088int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1089{
1090 int block_size = dev->dev_attrib.block_size;
1091
1092 if (dev->export_count) {
1093 pr_err("dev[%p]: Unable to change SE Device"
1094 " fabric_max_sectors while export_count is %d\n",
1095 dev, dev->export_count);
1096 return -EINVAL;
1097 }
1098 if (!fabric_max_sectors) {
1099 pr_err("dev[%p]: Illegal ZERO value for"
1100 " fabric_max_sectors\n", dev);
1101 return -EINVAL;
1102 }
1103 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1104 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1105 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1106 DA_STATUS_MAX_SECTORS_MIN);
1107 return -EINVAL;
1108 }
1109 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1110 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
1111 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1112 " greater than TCM/SE_Device max_sectors:"
1113 " %u\n", dev, fabric_max_sectors,
1114 dev->dev_attrib.hw_max_sectors);
1115 return -EINVAL;
1116 }
1117 } else {
1118 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1119 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1120 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1121 " %u\n", dev, fabric_max_sectors,
1122 DA_STATUS_MAX_SECTORS_MAX);
1123 return -EINVAL;
1124 }
1125 }
1126 /*
1127 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1128 */
1129 if (!block_size) {
1130 block_size = 512;
1131 pr_warn("Defaulting to 512 for zero block_size\n");
1132 }
1133 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1134 block_size);
1135
1136 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
1137 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1138 dev, fabric_max_sectors);
1139 return 0;
1140}
1141
1142int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1143{
1144 if (dev->export_count) {
1145 pr_err("dev[%p]: Unable to change SE Device"
1146 " optimal_sectors while export_count is %d\n",
1147 dev, dev->export_count);
1148 return -EINVAL;
1149 }
1150 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1151 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1152 " changed for TCM/pSCSI\n", dev);
1153 return -EINVAL;
1154 }
1155 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1156 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1157 " greater than fabric_max_sectors: %u\n", dev,
1158 optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1159 return -EINVAL;
1160 }
1161
1162 dev->dev_attrib.optimal_sectors = optimal_sectors;
1163 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1164 dev, optimal_sectors);
1165 return 0;
1166}
1167
1168int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1169{
1170 if (dev->export_count) {
1171 pr_err("dev[%p]: Unable to change SE Device block_size"
1172 " while export_count is %d\n",
1173 dev, dev->export_count);
1174 return -EINVAL;
1175 }
1176
1177 if ((block_size != 512) &&
1178 (block_size != 1024) &&
1179 (block_size != 2048) &&
1180 (block_size != 4096)) {
1181 pr_err("dev[%p]: Illegal value for block_device: %u"
1182 " for SE device, must be 512, 1024, 2048 or 4096\n",
1183 dev, block_size);
1184 return -EINVAL;
1185 }
1186
1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1188 pr_err("dev[%p]: Not allowed to change block_size for"
1189 " Physical Device, use for Linux/SCSI to change"
1190 " block_size for underlying hardware\n", dev);
1191 return -EINVAL;
1192 }
1193
1194 dev->dev_attrib.block_size = block_size;
1195 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1196 dev, block_size);
1197
1198 if (dev->dev_attrib.max_bytes_per_io)
1199 dev->dev_attrib.hw_max_sectors =
1200 dev->dev_attrib.max_bytes_per_io / block_size;
1201
1202 return 0;
1203}
1204
1205struct se_lun *core_dev_add_lun(
1206 struct se_portal_group *tpg,
1207 struct se_device *dev,
1208 u32 unpacked_lun)
1209{
1210 struct se_lun *lun;
1211 int rc;
1212
1213 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1214 if (IS_ERR(lun))
1215 return lun;
1216
1217 rc = core_tpg_add_lun(tpg, lun,
1218 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1219 if (rc < 0)
1220 return ERR_PTR(rc);
1221
1222 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1223 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1224 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1225 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1226 /*
1227 * Update LUN maps for dynamically added initiators when
1228 * generate_node_acl is enabled.
1229 */
1230 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1231 struct se_node_acl *acl;
1232 spin_lock_irq(&tpg->acl_node_lock);
1233 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1234 if (acl->dynamic_node_acl &&
1235 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1236 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1237 spin_unlock_irq(&tpg->acl_node_lock);
1238 core_tpg_add_node_to_devs(acl, tpg);
1239 spin_lock_irq(&tpg->acl_node_lock);
1240 }
1241 }
1242 spin_unlock_irq(&tpg->acl_node_lock);
1243 }
1244
1245 return lun;
1246}
1247
1248/* core_dev_del_lun():
1249 *
1250 *
1251 */
1252int core_dev_del_lun(
1253 struct se_portal_group *tpg,
1254 u32 unpacked_lun)
1255{
1256 struct se_lun *lun;
1257
1258 lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1259 if (IS_ERR(lun))
1260 return PTR_ERR(lun);
1261
1262 core_tpg_post_dellun(tpg, lun);
1263
1264 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1265 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1266 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1267 tpg->se_tpg_tfo->get_fabric_name());
1268
1269 return 0;
1270}
1271
1272struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1273{
1274 struct se_lun *lun;
1275
1276 spin_lock(&tpg->tpg_lun_lock);
1277 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1278 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1279 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1280 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1281 TRANSPORT_MAX_LUNS_PER_TPG-1,
1282 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1283 spin_unlock(&tpg->tpg_lun_lock);
1284 return NULL;
1285 }
1286 lun = tpg->tpg_lun_list[unpacked_lun];
1287
1288 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1289 pr_err("%s Logical Unit Number: %u is not free on"
1290 " Target Portal Group: %hu, ignoring request.\n",
1291 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1292 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1293 spin_unlock(&tpg->tpg_lun_lock);
1294 return NULL;
1295 }
1296 spin_unlock(&tpg->tpg_lun_lock);
1297
1298 return lun;
1299}
1300
1301/* core_dev_get_lun():
1302 *
1303 *
1304 */
1305static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1306{
1307 struct se_lun *lun;
1308
1309 spin_lock(&tpg->tpg_lun_lock);
1310 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1311 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1312 "_TPG-1: %u for Target Portal Group: %hu\n",
1313 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1314 TRANSPORT_MAX_LUNS_PER_TPG-1,
1315 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1316 spin_unlock(&tpg->tpg_lun_lock);
1317 return NULL;
1318 }
1319 lun = tpg->tpg_lun_list[unpacked_lun];
1320
1321 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1322 pr_err("%s Logical Unit Number: %u is not active on"
1323 " Target Portal Group: %hu, ignoring request.\n",
1324 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1325 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1326 spin_unlock(&tpg->tpg_lun_lock);
1327 return NULL;
1328 }
1329 spin_unlock(&tpg->tpg_lun_lock);
1330
1331 return lun;
1332}
1333
1334struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1335 struct se_portal_group *tpg,
1336 struct se_node_acl *nacl,
1337 u32 mapped_lun,
1338 int *ret)
1339{
1340 struct se_lun_acl *lacl;
1341
1342 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1343 pr_err("%s InitiatorName exceeds maximum size.\n",
1344 tpg->se_tpg_tfo->get_fabric_name());
1345 *ret = -EOVERFLOW;
1346 return NULL;
1347 }
1348 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1349 if (!lacl) {
1350 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1351 *ret = -ENOMEM;
1352 return NULL;
1353 }
1354
1355 INIT_LIST_HEAD(&lacl->lacl_list);
1356 lacl->mapped_lun = mapped_lun;
1357 lacl->se_lun_nacl = nacl;
1358 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1359 nacl->initiatorname);
1360
1361 return lacl;
1362}
1363
1364int core_dev_add_initiator_node_lun_acl(
1365 struct se_portal_group *tpg,
1366 struct se_lun_acl *lacl,
1367 u32 unpacked_lun,
1368 u32 lun_access)
1369{
1370 struct se_lun *lun;
1371 struct se_node_acl *nacl;
1372
1373 lun = core_dev_get_lun(tpg, unpacked_lun);
1374 if (!lun) {
1375 pr_err("%s Logical Unit Number: %u is not active on"
1376 " Target Portal Group: %hu, ignoring request.\n",
1377 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1378 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1379 return -EINVAL;
1380 }
1381
1382 nacl = lacl->se_lun_nacl;
1383 if (!nacl)
1384 return -EINVAL;
1385
1386 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1387 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1388 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1389
1390 lacl->se_lun = lun;
1391
1392 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1393 lun_access, nacl, tpg) < 0)
1394 return -EINVAL;
1395
1396 spin_lock(&lun->lun_acl_lock);
1397 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1398 atomic_inc(&lun->lun_acl_count);
1399 smp_mb__after_atomic_inc();
1400 spin_unlock(&lun->lun_acl_lock);
1401
1402 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1403 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1404 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1405 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1406 lacl->initiatorname);
1407 /*
1408 * Check to see if there are any existing persistent reservation APTPL
1409 * pre-registrations that need to be enabled for this LUN ACL..
1410 */
1411 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1412 return 0;
1413}
1414
1415/* core_dev_del_initiator_node_lun_acl():
1416 *
1417 *
1418 */
1419int core_dev_del_initiator_node_lun_acl(
1420 struct se_portal_group *tpg,
1421 struct se_lun *lun,
1422 struct se_lun_acl *lacl)
1423{
1424 struct se_node_acl *nacl;
1425
1426 nacl = lacl->se_lun_nacl;
1427 if (!nacl)
1428 return -EINVAL;
1429
1430 spin_lock(&lun->lun_acl_lock);
1431 list_del(&lacl->lacl_list);
1432 atomic_dec(&lun->lun_acl_count);
1433 smp_mb__after_atomic_dec();
1434 spin_unlock(&lun->lun_acl_lock);
1435
1436 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1437 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1438
1439 lacl->se_lun = NULL;
1440
1441 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1442 " InitiatorNode: %s Mapped LUN: %u\n",
1443 tpg->se_tpg_tfo->get_fabric_name(),
1444 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1445 lacl->initiatorname, lacl->mapped_lun);
1446
1447 return 0;
1448}
1449
1450void core_dev_free_initiator_node_lun_acl(
1451 struct se_portal_group *tpg,
1452 struct se_lun_acl *lacl)
1453{
1454 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1455 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1456 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1457 tpg->se_tpg_tfo->get_fabric_name(),
1458 lacl->initiatorname, lacl->mapped_lun);
1459
1460 kfree(lacl);
1461}
1462
1463static void scsi_dump_inquiry(struct se_device *dev)
1464{
1465 struct t10_wwn *wwn = &dev->t10_wwn;
1466 char buf[17];
1467 int i, device_type;
1468 /*
1469 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1470 */
1471 for (i = 0; i < 8; i++)
1472 if (wwn->vendor[i] >= 0x20)
1473 buf[i] = wwn->vendor[i];
1474 else
1475 buf[i] = ' ';
1476 buf[i] = '\0';
1477 pr_debug(" Vendor: %s\n", buf);
1478
1479 for (i = 0; i < 16; i++)
1480 if (wwn->model[i] >= 0x20)
1481 buf[i] = wwn->model[i];
1482 else
1483 buf[i] = ' ';
1484 buf[i] = '\0';
1485 pr_debug(" Model: %s\n", buf);
1486
1487 for (i = 0; i < 4; i++)
1488 if (wwn->revision[i] >= 0x20)
1489 buf[i] = wwn->revision[i];
1490 else
1491 buf[i] = ' ';
1492 buf[i] = '\0';
1493 pr_debug(" Revision: %s\n", buf);
1494
1495 device_type = dev->transport->get_device_type(dev);
1496 pr_debug(" Type: %s ", scsi_device_type(device_type));
1497}
1498
1499struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1500{
1501 struct se_device *dev;
1502 struct se_lun *xcopy_lun;
1503
1504 dev = hba->transport->alloc_device(hba, name);
1505 if (!dev)
1506 return NULL;
1507
1508 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1509 dev->se_hba = hba;
1510 dev->transport = hba->transport;
1511 dev->prot_length = sizeof(struct se_dif_v1_tuple);
1512
1513 INIT_LIST_HEAD(&dev->dev_list);
1514 INIT_LIST_HEAD(&dev->dev_sep_list);
1515 INIT_LIST_HEAD(&dev->dev_tmr_list);
1516 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1517 INIT_LIST_HEAD(&dev->state_list);
1518 INIT_LIST_HEAD(&dev->qf_cmd_list);
1519 INIT_LIST_HEAD(&dev->g_dev_node);
1520 spin_lock_init(&dev->execute_task_lock);
1521 spin_lock_init(&dev->delayed_cmd_lock);
1522 spin_lock_init(&dev->dev_reservation_lock);
1523 spin_lock_init(&dev->se_port_lock);
1524 spin_lock_init(&dev->se_tmr_lock);
1525 spin_lock_init(&dev->qf_cmd_lock);
1526 sema_init(&dev->caw_sem, 1);
1527 atomic_set(&dev->dev_ordered_id, 0);
1528 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1529 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1530 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1531 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1532 spin_lock_init(&dev->t10_pr.registration_lock);
1533 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1534 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1535 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1536 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1537 spin_lock_init(&dev->t10_alua.lba_map_lock);
1538
1539 dev->t10_wwn.t10_dev = dev;
1540 dev->t10_alua.t10_dev = dev;
1541
1542 dev->dev_attrib.da_dev = dev;
1543 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1544 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1545 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1546 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1547 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1548 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1549 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1550 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1551 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1552 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1553 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1554 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1555 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1556 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1557 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1558 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1559 dev->dev_attrib.max_unmap_block_desc_count =
1560 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1561 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1562 dev->dev_attrib.unmap_granularity_alignment =
1563 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1564 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1565 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1566 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1567
1568 xcopy_lun = &dev->xcopy_lun;
1569 xcopy_lun->lun_se_dev = dev;
1570 init_completion(&xcopy_lun->lun_shutdown_comp);
1571 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1572 spin_lock_init(&xcopy_lun->lun_acl_lock);
1573 spin_lock_init(&xcopy_lun->lun_sep_lock);
1574 init_completion(&xcopy_lun->lun_ref_comp);
1575
1576 return dev;
1577}
1578
1579int target_configure_device(struct se_device *dev)
1580{
1581 struct se_hba *hba = dev->se_hba;
1582 int ret;
1583
1584 if (dev->dev_flags & DF_CONFIGURED) {
1585 pr_err("se_dev->se_dev_ptr already set for storage"
1586 " object\n");
1587 return -EEXIST;
1588 }
1589
1590 ret = dev->transport->configure_device(dev);
1591 if (ret)
1592 goto out;
1593 dev->dev_flags |= DF_CONFIGURED;
1594
1595 /*
1596 * XXX: there is not much point to have two different values here..
1597 */
1598 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1599 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1600
1601 /*
1602 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1603 */
1604 dev->dev_attrib.hw_max_sectors =
1605 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1606 dev->dev_attrib.hw_block_size);
1607
1608 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1609 dev->creation_time = get_jiffies_64();
1610
1611 ret = core_setup_alua(dev);
1612 if (ret)
1613 goto out;
1614
1615 /*
1616 * Startup the struct se_device processing thread
1617 */
1618 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1619 dev->transport->name);
1620 if (!dev->tmr_wq) {
1621 pr_err("Unable to create tmr workqueue for %s\n",
1622 dev->transport->name);
1623 ret = -ENOMEM;
1624 goto out_free_alua;
1625 }
1626
1627 /*
1628 * Setup work_queue for QUEUE_FULL
1629 */
1630 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1631
1632 /*
1633 * Preload the initial INQUIRY const values if we are doing
1634 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1635 * passthrough because this is being provided by the backend LLD.
1636 */
1637 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1638 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1639 strncpy(&dev->t10_wwn.model[0],
1640 dev->transport->inquiry_prod, 16);
1641 strncpy(&dev->t10_wwn.revision[0],
1642 dev->transport->inquiry_rev, 4);
1643 }
1644
1645 scsi_dump_inquiry(dev);
1646
1647 spin_lock(&hba->device_lock);
1648 hba->dev_count++;
1649 spin_unlock(&hba->device_lock);
1650
1651 mutex_lock(&g_device_mutex);
1652 list_add_tail(&dev->g_dev_node, &g_device_list);
1653 mutex_unlock(&g_device_mutex);
1654
1655 return 0;
1656
1657out_free_alua:
1658 core_alua_free_lu_gp_mem(dev);
1659out:
1660 se_release_vpd_for_dev(dev);
1661 return ret;
1662}
1663
1664void target_free_device(struct se_device *dev)
1665{
1666 struct se_hba *hba = dev->se_hba;
1667
1668 WARN_ON(!list_empty(&dev->dev_sep_list));
1669
1670 if (dev->dev_flags & DF_CONFIGURED) {
1671 destroy_workqueue(dev->tmr_wq);
1672
1673 mutex_lock(&g_device_mutex);
1674 list_del(&dev->g_dev_node);
1675 mutex_unlock(&g_device_mutex);
1676
1677 spin_lock(&hba->device_lock);
1678 hba->dev_count--;
1679 spin_unlock(&hba->device_lock);
1680 }
1681
1682 core_alua_free_lu_gp_mem(dev);
1683 core_alua_set_lba_map(dev, NULL, 0, 0);
1684 core_scsi3_free_all_registrations(dev);
1685 se_release_vpd_for_dev(dev);
1686
1687 if (dev->transport->free_prot)
1688 dev->transport->free_prot(dev);
1689
1690 dev->transport->free_device(dev);
1691}
1692
1693int core_dev_setup_virtual_lun0(void)
1694{
1695 struct se_hba *hba;
1696 struct se_device *dev;
1697 char buf[] = "rd_pages=8,rd_nullio=1";
1698 int ret;
1699
1700 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1701 if (IS_ERR(hba))
1702 return PTR_ERR(hba);
1703
1704 dev = target_alloc_device(hba, "virt_lun0");
1705 if (!dev) {
1706 ret = -ENOMEM;
1707 goto out_free_hba;
1708 }
1709
1710 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1711
1712 ret = target_configure_device(dev);
1713 if (ret)
1714 goto out_free_se_dev;
1715
1716 lun0_hba = hba;
1717 g_lun0_dev = dev;
1718 return 0;
1719
1720out_free_se_dev:
1721 target_free_device(dev);
1722out_free_hba:
1723 core_delete_hba(hba);
1724 return ret;
1725}
1726
1727
1728void core_dev_release_virtual_lun0(void)
1729{
1730 struct se_hba *hba = lun0_hba;
1731
1732 if (!hba)
1733 return;
1734
1735 if (g_lun0_dev)
1736 target_free_device(g_lun0_dev);
1737 core_delete_hba(hba);
1738}