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