target: Fix off-by-seven in target_report_luns
[linux-2.6.git] / drivers / target / target_core_device.c
1 /*******************************************************************************
2  * Filename:  target_core_device.c (based on iscsi_target_device.c)
3  *
4  * This file contains the TCM Virtual Device and Disk Transport
5  * agnostic related functions.
6  *
7  * 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
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         spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
163         list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
164         spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
165
166         return 0;
167 }
168 EXPORT_SYMBOL(transport_lookup_cmd_lun);
169
170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
171 {
172         struct se_dev_entry *deve;
173         struct se_lun *se_lun = NULL;
174         struct se_session *se_sess = se_cmd->se_sess;
175         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
176         unsigned long flags;
177
178         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
179                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
180                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
181                 return -ENODEV;
182         }
183
184         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
185         se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
186         deve = se_cmd->se_deve;
187
188         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
189                 se_tmr->tmr_lun = deve->se_lun;
190                 se_cmd->se_lun = deve->se_lun;
191                 se_lun = deve->se_lun;
192                 se_cmd->pr_res_key = deve->pr_res_key;
193                 se_cmd->orig_fe_lun = unpacked_lun;
194         }
195         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
196
197         if (!se_lun) {
198                 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
199                         " Access for 0x%08x\n",
200                         se_cmd->se_tfo->get_fabric_name(),
201                         unpacked_lun);
202                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
203                 return -ENODEV;
204         }
205         /*
206          * Determine if the struct se_lun is online.
207          * FIXME: Check for LUN_RESET + UNIT Attention
208          */
209         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
210                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
211                 return -ENODEV;
212         }
213
214         /* Directly associate cmd with se_dev */
215         se_cmd->se_dev = se_lun->lun_se_dev;
216         se_tmr->tmr_dev = se_lun->lun_se_dev;
217
218         spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
219         list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
220         spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
221
222         return 0;
223 }
224 EXPORT_SYMBOL(transport_lookup_tmr_lun);
225
226 /*
227  * This function is called from core_scsi3_emulate_pro_register_and_move()
228  * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
229  * when a matching rtpi is found.
230  */
231 struct se_dev_entry *core_get_se_deve_from_rtpi(
232         struct se_node_acl *nacl,
233         u16 rtpi)
234 {
235         struct se_dev_entry *deve;
236         struct se_lun *lun;
237         struct se_port *port;
238         struct se_portal_group *tpg = nacl->se_tpg;
239         u32 i;
240
241         spin_lock_irq(&nacl->device_list_lock);
242         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
243                 deve = &nacl->device_list[i];
244
245                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
246                         continue;
247
248                 lun = deve->se_lun;
249                 if (!lun) {
250                         pr_err("%s device entries device pointer is"
251                                 " NULL, but Initiator has access.\n",
252                                 tpg->se_tpg_tfo->get_fabric_name());
253                         continue;
254                 }
255                 port = lun->lun_sep;
256                 if (!port) {
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                 if (port->sep_rtpi != rtpi)
263                         continue;
264
265                 atomic_inc(&deve->pr_ref_count);
266                 smp_mb__after_atomic_inc();
267                 spin_unlock_irq(&nacl->device_list_lock);
268
269                 return deve;
270         }
271         spin_unlock_irq(&nacl->device_list_lock);
272
273         return NULL;
274 }
275
276 int core_free_device_list_for_node(
277         struct se_node_acl *nacl,
278         struct se_portal_group *tpg)
279 {
280         struct se_dev_entry *deve;
281         struct se_lun *lun;
282         u32 i;
283
284         if (!nacl->device_list)
285                 return 0;
286
287         spin_lock_irq(&nacl->device_list_lock);
288         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
289                 deve = &nacl->device_list[i];
290
291                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
292                         continue;
293
294                 if (!deve->se_lun) {
295                         pr_err("%s device entries device pointer is"
296                                 " NULL, but Initiator has access.\n",
297                                 tpg->se_tpg_tfo->get_fabric_name());
298                         continue;
299                 }
300                 lun = deve->se_lun;
301
302                 spin_unlock_irq(&nacl->device_list_lock);
303                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
304                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
305                 spin_lock_irq(&nacl->device_list_lock);
306         }
307         spin_unlock_irq(&nacl->device_list_lock);
308
309         kfree(nacl->device_list);
310         nacl->device_list = NULL;
311
312         return 0;
313 }
314
315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
316 {
317         struct se_dev_entry *deve;
318         unsigned long flags;
319
320         spin_lock_irqsave(&se_nacl->device_list_lock, flags);
321         deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
322         deve->deve_cmds--;
323         spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
324 }
325
326 void core_update_device_list_access(
327         u32 mapped_lun,
328         u32 lun_access,
329         struct se_node_acl *nacl)
330 {
331         struct se_dev_entry *deve;
332
333         spin_lock_irq(&nacl->device_list_lock);
334         deve = &nacl->device_list[mapped_lun];
335         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
336                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
337                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
338         } else {
339                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
340                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
341         }
342         spin_unlock_irq(&nacl->device_list_lock);
343 }
344
345 /*      core_update_device_list_for_node():
346  *
347  *
348  */
349 int core_update_device_list_for_node(
350         struct se_lun *lun,
351         struct se_lun_acl *lun_acl,
352         u32 mapped_lun,
353         u32 lun_access,
354         struct se_node_acl *nacl,
355         struct se_portal_group *tpg,
356         int enable)
357 {
358         struct se_port *port = lun->lun_sep;
359         struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
360         int trans = 0;
361         /*
362          * If the MappedLUN entry is being disabled, the entry in
363          * port->sep_alua_list must be removed now before clearing the
364          * struct se_dev_entry pointers below as logic in
365          * core_alua_do_transition_tg_pt() depends on these being present.
366          */
367         if (!enable) {
368                 /*
369                  * deve->se_lun_acl will be NULL for demo-mode created LUNs
370                  * that have not been explicitly concerted to MappedLUNs ->
371                  * struct se_lun_acl, but we remove deve->alua_port_list from
372                  * port->sep_alua_list. This also means that active UAs and
373                  * NodeACL context specific PR metadata for demo-mode
374                  * MappedLUN *deve will be released below..
375                  */
376                 spin_lock_bh(&port->sep_alua_lock);
377                 list_del(&deve->alua_port_list);
378                 spin_unlock_bh(&port->sep_alua_lock);
379         }
380
381         spin_lock_irq(&nacl->device_list_lock);
382         if (enable) {
383                 /*
384                  * Check if the call is handling demo mode -> explict LUN ACL
385                  * transition.  This transition must be for the same struct se_lun
386                  * + mapped_lun that was setup in demo mode..
387                  */
388                 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
389                         if (deve->se_lun_acl != NULL) {
390                                 pr_err("struct se_dev_entry->se_lun_acl"
391                                         " already set for demo mode -> explict"
392                                         " LUN ACL transition\n");
393                                 spin_unlock_irq(&nacl->device_list_lock);
394                                 return -EINVAL;
395                         }
396                         if (deve->se_lun != lun) {
397                                 pr_err("struct se_dev_entry->se_lun does"
398                                         " match passed struct se_lun for demo mode"
399                                         " -> explict LUN ACL transition\n");
400                                 spin_unlock_irq(&nacl->device_list_lock);
401                                 return -EINVAL;
402                         }
403                         deve->se_lun_acl = lun_acl;
404                         trans = 1;
405                 } else {
406                         deve->se_lun = lun;
407                         deve->se_lun_acl = lun_acl;
408                         deve->mapped_lun = mapped_lun;
409                         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
410                 }
411
412                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
413                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
414                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
415                 } else {
416                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
417                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
418                 }
419
420                 if (trans) {
421                         spin_unlock_irq(&nacl->device_list_lock);
422                         return 0;
423                 }
424                 deve->creation_time = get_jiffies_64();
425                 deve->attach_count++;
426                 spin_unlock_irq(&nacl->device_list_lock);
427
428                 spin_lock_bh(&port->sep_alua_lock);
429                 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
430                 spin_unlock_bh(&port->sep_alua_lock);
431
432                 return 0;
433         }
434         /*
435          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
436          * PR operation to complete.
437          */
438         spin_unlock_irq(&nacl->device_list_lock);
439         while (atomic_read(&deve->pr_ref_count) != 0)
440                 cpu_relax();
441         spin_lock_irq(&nacl->device_list_lock);
442         /*
443          * Disable struct se_dev_entry LUN ACL mapping
444          */
445         core_scsi3_ua_release_all(deve);
446         deve->se_lun = NULL;
447         deve->se_lun_acl = NULL;
448         deve->lun_flags = 0;
449         deve->creation_time = 0;
450         deve->attach_count--;
451         spin_unlock_irq(&nacl->device_list_lock);
452
453         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
454         return 0;
455 }
456
457 /*      core_clear_lun_from_tpg():
458  *
459  *
460  */
461 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
462 {
463         struct se_node_acl *nacl;
464         struct se_dev_entry *deve;
465         u32 i;
466
467         spin_lock_irq(&tpg->acl_node_lock);
468         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
469                 spin_unlock_irq(&tpg->acl_node_lock);
470
471                 spin_lock_irq(&nacl->device_list_lock);
472                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
473                         deve = &nacl->device_list[i];
474                         if (lun != deve->se_lun)
475                                 continue;
476                         spin_unlock_irq(&nacl->device_list_lock);
477
478                         core_update_device_list_for_node(lun, NULL,
479                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
480                                 nacl, tpg, 0);
481
482                         spin_lock_irq(&nacl->device_list_lock);
483                 }
484                 spin_unlock_irq(&nacl->device_list_lock);
485
486                 spin_lock_irq(&tpg->acl_node_lock);
487         }
488         spin_unlock_irq(&tpg->acl_node_lock);
489 }
490
491 static struct se_port *core_alloc_port(struct se_device *dev)
492 {
493         struct se_port *port, *port_tmp;
494
495         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
496         if (!port) {
497                 pr_err("Unable to allocate struct se_port\n");
498                 return ERR_PTR(-ENOMEM);
499         }
500         INIT_LIST_HEAD(&port->sep_alua_list);
501         INIT_LIST_HEAD(&port->sep_list);
502         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
503         spin_lock_init(&port->sep_alua_lock);
504         mutex_init(&port->sep_tg_pt_md_mutex);
505
506         spin_lock(&dev->se_port_lock);
507         if (dev->dev_port_count == 0x0000ffff) {
508                 pr_warn("Reached dev->dev_port_count =="
509                                 " 0x0000ffff\n");
510                 spin_unlock(&dev->se_port_lock);
511                 return ERR_PTR(-ENOSPC);
512         }
513 again:
514         /*
515          * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
516          * Here is the table from spc4r17 section 7.7.3.8.
517          *
518          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
519          *
520          * Code      Description
521          * 0h        Reserved
522          * 1h        Relative port 1, historically known as port A
523          * 2h        Relative port 2, historically known as port B
524          * 3h to FFFFh    Relative port 3 through 65 535
525          */
526         port->sep_rtpi = dev->dev_rpti_counter++;
527         if (!port->sep_rtpi)
528                 goto again;
529
530         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
531                 /*
532                  * Make sure RELATIVE TARGET PORT IDENTIFER is unique
533                  * for 16-bit wrap..
534                  */
535                 if (port->sep_rtpi == port_tmp->sep_rtpi)
536                         goto again;
537         }
538         spin_unlock(&dev->se_port_lock);
539
540         return port;
541 }
542
543 static void core_export_port(
544         struct se_device *dev,
545         struct se_portal_group *tpg,
546         struct se_port *port,
547         struct se_lun *lun)
548 {
549         struct se_subsystem_dev *su_dev = dev->se_sub_dev;
550         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
551
552         spin_lock(&dev->se_port_lock);
553         spin_lock(&lun->lun_sep_lock);
554         port->sep_tpg = tpg;
555         port->sep_lun = lun;
556         lun->lun_sep = port;
557         spin_unlock(&lun->lun_sep_lock);
558
559         list_add_tail(&port->sep_list, &dev->dev_sep_list);
560         spin_unlock(&dev->se_port_lock);
561
562         if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
563                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
564                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
565                         pr_err("Unable to allocate t10_alua_tg_pt"
566                                         "_gp_member_t\n");
567                         return;
568                 }
569                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
570                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
571                         su_dev->t10_alua.default_tg_pt_gp);
572                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
573                 pr_debug("%s/%s: Adding to default ALUA Target Port"
574                         " Group: alua/default_tg_pt_gp\n",
575                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
576         }
577
578         dev->dev_port_count++;
579         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
580 }
581
582 /*
583  *      Called with struct se_device->se_port_lock spinlock held.
584  */
585 static void core_release_port(struct se_device *dev, struct se_port *port)
586         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
587 {
588         /*
589          * Wait for any port reference for PR ALL_TG_PT=1 operation
590          * to complete in __core_scsi3_alloc_registration()
591          */
592         spin_unlock(&dev->se_port_lock);
593         if (atomic_read(&port->sep_tg_pt_ref_cnt))
594                 cpu_relax();
595         spin_lock(&dev->se_port_lock);
596
597         core_alua_free_tg_pt_gp_mem(port);
598
599         list_del(&port->sep_list);
600         dev->dev_port_count--;
601         kfree(port);
602 }
603
604 int core_dev_export(
605         struct se_device *dev,
606         struct se_portal_group *tpg,
607         struct se_lun *lun)
608 {
609         struct se_port *port;
610
611         port = core_alloc_port(dev);
612         if (IS_ERR(port))
613                 return PTR_ERR(port);
614
615         lun->lun_se_dev = dev;
616         se_dev_start(dev);
617
618         atomic_inc(&dev->dev_export_obj.obj_access_count);
619         core_export_port(dev, tpg, port, lun);
620         return 0;
621 }
622
623 void core_dev_unexport(
624         struct se_device *dev,
625         struct se_portal_group *tpg,
626         struct se_lun *lun)
627 {
628         struct se_port *port = lun->lun_sep;
629
630         spin_lock(&lun->lun_sep_lock);
631         if (lun->lun_se_dev == NULL) {
632                 spin_unlock(&lun->lun_sep_lock);
633                 return;
634         }
635         spin_unlock(&lun->lun_sep_lock);
636
637         spin_lock(&dev->se_port_lock);
638         atomic_dec(&dev->dev_export_obj.obj_access_count);
639         core_release_port(dev, port);
640         spin_unlock(&dev->se_port_lock);
641
642         se_dev_stop(dev);
643         lun->lun_se_dev = NULL;
644 }
645
646 int target_report_luns(struct se_task *se_task)
647 {
648         struct se_cmd *se_cmd = se_task->task_se_cmd;
649         struct se_dev_entry *deve;
650         struct se_lun *se_lun;
651         struct se_session *se_sess = se_cmd->se_sess;
652         unsigned char *buf;
653         u32 lun_count = 0, offset = 8, i;
654
655         buf = transport_kmap_data_sg(se_cmd);
656         if (!buf)
657                 return -ENOMEM;
658
659         /*
660          * If no struct se_session pointer is present, this struct se_cmd is
661          * coming via a target_core_mod PASSTHROUGH op, and not through
662          * a $FABRIC_MOD.  In that case, report LUN=0 only.
663          */
664         if (!se_sess) {
665                 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
666                 lun_count = 1;
667                 goto done;
668         }
669
670         spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
671         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
672                 deve = &se_sess->se_node_acl->device_list[i];
673                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
674                         continue;
675                 se_lun = deve->se_lun;
676                 /*
677                  * We determine the correct LUN LIST LENGTH even once we
678                  * have reached the initial allocation length.
679                  * See SPC2-R20 7.19.
680                  */
681                 lun_count++;
682                 if ((offset + 8) > se_cmd->data_length)
683                         continue;
684
685                 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
686                 offset += 8;
687         }
688         spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
689
690         /*
691          * See SPC3 r07, page 159.
692          */
693 done:
694         lun_count *= 8;
695         buf[0] = ((lun_count >> 24) & 0xff);
696         buf[1] = ((lun_count >> 16) & 0xff);
697         buf[2] = ((lun_count >> 8) & 0xff);
698         buf[3] = (lun_count & 0xff);
699         transport_kunmap_data_sg(se_cmd);
700
701         se_task->task_scsi_status = GOOD;
702         transport_complete_task(se_task, 1);
703         return 0;
704 }
705
706 /*      se_release_device_for_hba():
707  *
708  *
709  */
710 void se_release_device_for_hba(struct se_device *dev)
711 {
712         struct se_hba *hba = dev->se_hba;
713
714         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
715             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
716             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
717             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
718             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
719                 se_dev_stop(dev);
720
721         if (dev->dev_ptr) {
722                 kthread_stop(dev->process_thread);
723                 if (dev->transport->free_device)
724                         dev->transport->free_device(dev->dev_ptr);
725         }
726
727         spin_lock(&hba->device_lock);
728         list_del(&dev->dev_list);
729         hba->dev_count--;
730         spin_unlock(&hba->device_lock);
731
732         core_scsi3_free_all_registrations(dev);
733         se_release_vpd_for_dev(dev);
734
735         kfree(dev);
736 }
737
738 void se_release_vpd_for_dev(struct se_device *dev)
739 {
740         struct t10_vpd *vpd, *vpd_tmp;
741
742         spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
743         list_for_each_entry_safe(vpd, vpd_tmp,
744                         &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
745                 list_del(&vpd->vpd_list);
746                 kfree(vpd);
747         }
748         spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
749 }
750
751 /*      se_free_virtual_device():
752  *
753  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
754  */
755 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
756 {
757         if (!list_empty(&dev->dev_sep_list))
758                 dump_stack();
759
760         core_alua_free_lu_gp_mem(dev);
761         se_release_device_for_hba(dev);
762
763         return 0;
764 }
765
766 static void se_dev_start(struct se_device *dev)
767 {
768         struct se_hba *hba = dev->se_hba;
769
770         spin_lock(&hba->device_lock);
771         atomic_inc(&dev->dev_obj.obj_access_count);
772         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
773                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
774                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
775                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
776                 } else if (dev->dev_status &
777                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
778                         dev->dev_status &=
779                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
780                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
781                 }
782         }
783         spin_unlock(&hba->device_lock);
784 }
785
786 static void se_dev_stop(struct se_device *dev)
787 {
788         struct se_hba *hba = dev->se_hba;
789
790         spin_lock(&hba->device_lock);
791         atomic_dec(&dev->dev_obj.obj_access_count);
792         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
793                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
794                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
795                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
796                 } else if (dev->dev_status &
797                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
798                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
799                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
800                 }
801         }
802         spin_unlock(&hba->device_lock);
803 }
804
805 int se_dev_check_online(struct se_device *dev)
806 {
807         unsigned long flags;
808         int ret;
809
810         spin_lock_irqsave(&dev->dev_status_lock, flags);
811         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
812                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
813         spin_unlock_irqrestore(&dev->dev_status_lock, flags);
814
815         return ret;
816 }
817
818 int se_dev_check_shutdown(struct se_device *dev)
819 {
820         int ret;
821
822         spin_lock_irq(&dev->dev_status_lock);
823         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
824         spin_unlock_irq(&dev->dev_status_lock);
825
826         return ret;
827 }
828
829 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
830 {
831         u32 tmp, aligned_max_sectors;
832         /*
833          * Limit max_sectors to a PAGE_SIZE aligned value for modern
834          * transport_allocate_data_tasks() operation.
835          */
836         tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
837         aligned_max_sectors = (tmp / block_size);
838         if (max_sectors != aligned_max_sectors) {
839                 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
840                                 " to %u\n", max_sectors, aligned_max_sectors);
841                 return aligned_max_sectors;
842         }
843
844         return max_sectors;
845 }
846
847 void se_dev_set_default_attribs(
848         struct se_device *dev,
849         struct se_dev_limits *dev_limits)
850 {
851         struct queue_limits *limits = &dev_limits->limits;
852
853         dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
854         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
855         dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
856         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
857         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
858         dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
859         dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
860         dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
861         dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
862         dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
863         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
864         dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
865         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
866         /*
867          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
868          * iblock_create_virtdevice() from struct queue_limits values
869          * if blk_queue_discard()==1
870          */
871         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
872         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
873                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
874         dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
875         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
876                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
877         /*
878          * block_size is based on subsystem plugin dependent requirements.
879          */
880         dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
881         dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
882         /*
883          * max_sectors is based on subsystem plugin dependent requirements.
884          */
885         dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
886         /*
887          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
888          */
889         limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
890                                                 limits->logical_block_size);
891         dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
892         /*
893          * Set fabric_max_sectors, which is reported in block limits
894          * VPD page (B0h).
895          */
896         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
897         /*
898          * Set optimal_sectors from fabric_max_sectors, which can be
899          * lowered via configfs.
900          */
901         dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
902         /*
903          * queue_depth is based on subsystem plugin dependent requirements.
904          */
905         dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
906         dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
907 }
908
909 int se_dev_set_max_unmap_lba_count(
910         struct se_device *dev,
911         u32 max_unmap_lba_count)
912 {
913         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
914         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
915                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
916         return 0;
917 }
918
919 int se_dev_set_max_unmap_block_desc_count(
920         struct se_device *dev,
921         u32 max_unmap_block_desc_count)
922 {
923         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
924                 max_unmap_block_desc_count;
925         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
926                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
927         return 0;
928 }
929
930 int se_dev_set_unmap_granularity(
931         struct se_device *dev,
932         u32 unmap_granularity)
933 {
934         dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
935         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
936                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
937         return 0;
938 }
939
940 int se_dev_set_unmap_granularity_alignment(
941         struct se_device *dev,
942         u32 unmap_granularity_alignment)
943 {
944         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
945         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
946                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
947         return 0;
948 }
949
950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
951 {
952         if (flag != 0 && flag != 1) {
953                 pr_err("Illegal value %d\n", flag);
954                 return -EINVAL;
955         }
956
957         if (flag) {
958                 pr_err("dpo_emulated not supported\n");
959                 return -EINVAL;
960         }
961
962         return 0;
963 }
964
965 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
966 {
967         if (flag != 0 && flag != 1) {
968                 pr_err("Illegal value %d\n", flag);
969                 return -EINVAL;
970         }
971
972         if (flag && dev->transport->fua_write_emulated == 0) {
973                 pr_err("fua_write_emulated not supported\n");
974                 return -EINVAL;
975         }
976         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
977         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
978                         dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
979         return 0;
980 }
981
982 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
983 {
984         if (flag != 0 && flag != 1) {
985                 pr_err("Illegal value %d\n", flag);
986                 return -EINVAL;
987         }
988
989         if (flag) {
990                 pr_err("ua read emulated not supported\n");
991                 return -EINVAL;
992         }
993
994         return 0;
995 }
996
997 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
998 {
999         if (flag != 0 && flag != 1) {
1000                 pr_err("Illegal value %d\n", flag);
1001                 return -EINVAL;
1002         }
1003         if (flag && dev->transport->write_cache_emulated == 0) {
1004                 pr_err("write_cache_emulated not supported\n");
1005                 return -EINVAL;
1006         }
1007         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1008         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1009                         dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1010         return 0;
1011 }
1012
1013 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1014 {
1015         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1016                 pr_err("Illegal value %d\n", flag);
1017                 return -EINVAL;
1018         }
1019
1020         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1021                 pr_err("dev[%p]: Unable to change SE Device"
1022                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1023                         " exists\n", dev,
1024                         atomic_read(&dev->dev_export_obj.obj_access_count));
1025                 return -EINVAL;
1026         }
1027         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1028         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1029                 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1030
1031         return 0;
1032 }
1033
1034 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1035 {
1036         if ((flag != 0) && (flag != 1)) {
1037                 pr_err("Illegal value %d\n", flag);
1038                 return -EINVAL;
1039         }
1040
1041         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1042                 pr_err("dev[%p]: Unable to change SE Device TAS while"
1043                         " dev_export_obj: %d count exists\n", dev,
1044                         atomic_read(&dev->dev_export_obj.obj_access_count));
1045                 return -EINVAL;
1046         }
1047         dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1048         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1049                 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1050
1051         return 0;
1052 }
1053
1054 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1055 {
1056         if ((flag != 0) && (flag != 1)) {
1057                 pr_err("Illegal value %d\n", flag);
1058                 return -EINVAL;
1059         }
1060         /*
1061          * We expect this value to be non-zero when generic Block Layer
1062          * Discard supported is detected iblock_create_virtdevice().
1063          */
1064         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1065                 pr_err("Generic Block Discard not supported\n");
1066                 return -ENOSYS;
1067         }
1068
1069         dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1070         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1071                                 dev, flag);
1072         return 0;
1073 }
1074
1075 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1076 {
1077         if ((flag != 0) && (flag != 1)) {
1078                 pr_err("Illegal value %d\n", flag);
1079                 return -EINVAL;
1080         }
1081         /*
1082          * We expect this value to be non-zero when generic Block Layer
1083          * Discard supported is detected iblock_create_virtdevice().
1084          */
1085         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1086                 pr_err("Generic Block Discard not supported\n");
1087                 return -ENOSYS;
1088         }
1089
1090         dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1091         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1092                                 dev, flag);
1093         return 0;
1094 }
1095
1096 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1097 {
1098         if ((flag != 0) && (flag != 1)) {
1099                 pr_err("Illegal value %d\n", flag);
1100                 return -EINVAL;
1101         }
1102         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1103         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1104                 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1105         return 0;
1106 }
1107
1108 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1109 {
1110         if ((flag != 0) && (flag != 1)) {
1111                 printk(KERN_ERR "Illegal value %d\n", flag);
1112                 return -EINVAL;
1113         }
1114         dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1115         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1116                dev, flag);
1117         return 0;
1118 }
1119
1120 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1121 {
1122         if (flag != 0) {
1123                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1124                         " reordering not implemented\n", dev);
1125                 return -ENOSYS;
1126         }
1127         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1128         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1129         return 0;
1130 }
1131
1132 /*
1133  * Note, this can only be called on unexported SE Device Object.
1134  */
1135 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1136 {
1137         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1138                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1139                         " dev_export_obj: %d count exists\n", dev,
1140                         atomic_read(&dev->dev_export_obj.obj_access_count));
1141                 return -EINVAL;
1142         }
1143         if (!queue_depth) {
1144                 pr_err("dev[%p]: Illegal ZERO value for queue"
1145                         "_depth\n", dev);
1146                 return -EINVAL;
1147         }
1148
1149         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1150                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1151                         pr_err("dev[%p]: Passed queue_depth: %u"
1152                                 " exceeds TCM/SE_Device TCQ: %u\n",
1153                                 dev, queue_depth,
1154                                 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1155                         return -EINVAL;
1156                 }
1157         } else {
1158                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1159                         if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1160                                 pr_err("dev[%p]: Passed queue_depth:"
1161                                         " %u exceeds TCM/SE_Device MAX"
1162                                         " TCQ: %u\n", dev, queue_depth,
1163                                         dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1164                                 return -EINVAL;
1165                         }
1166                 }
1167         }
1168
1169         dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1170         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1171                         dev, queue_depth);
1172         return 0;
1173 }
1174
1175 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1176 {
1177         int force = 0; /* Force setting for VDEVS */
1178
1179         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1180                 pr_err("dev[%p]: Unable to change SE Device"
1181                         " max_sectors while dev_export_obj: %d count exists\n",
1182                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1183                 return -EINVAL;
1184         }
1185         if (!max_sectors) {
1186                 pr_err("dev[%p]: Illegal ZERO value for"
1187                         " max_sectors\n", dev);
1188                 return -EINVAL;
1189         }
1190         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1191                 pr_err("dev[%p]: Passed max_sectors: %u less than"
1192                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1193                                 DA_STATUS_MAX_SECTORS_MIN);
1194                 return -EINVAL;
1195         }
1196         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1197                 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1198                         pr_err("dev[%p]: Passed max_sectors: %u"
1199                                 " greater than TCM/SE_Device max_sectors:"
1200                                 " %u\n", dev, max_sectors,
1201                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1202                          return -EINVAL;
1203                 }
1204         } else {
1205                 if (!force && (max_sectors >
1206                                  dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1207                         pr_err("dev[%p]: Passed max_sectors: %u"
1208                                 " greater than TCM/SE_Device max_sectors"
1209                                 ": %u, use force=1 to override.\n", dev,
1210                                 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1211                         return -EINVAL;
1212                 }
1213                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1214                         pr_err("dev[%p]: Passed max_sectors: %u"
1215                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1216                                 " %u\n", dev, max_sectors,
1217                                 DA_STATUS_MAX_SECTORS_MAX);
1218                         return -EINVAL;
1219                 }
1220         }
1221         /*
1222          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1223          */
1224         max_sectors = se_dev_align_max_sectors(max_sectors,
1225                                 dev->se_sub_dev->se_dev_attrib.block_size);
1226
1227         dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1228         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1229                         dev, max_sectors);
1230         return 0;
1231 }
1232
1233 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1234 {
1235         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1236                 pr_err("dev[%p]: Unable to change SE Device"
1237                         " fabric_max_sectors while dev_export_obj: %d count exists\n",
1238                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1239                 return -EINVAL;
1240         }
1241         if (!fabric_max_sectors) {
1242                 pr_err("dev[%p]: Illegal ZERO value for"
1243                         " fabric_max_sectors\n", dev);
1244                 return -EINVAL;
1245         }
1246         if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1247                 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1248                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1249                                 DA_STATUS_MAX_SECTORS_MIN);
1250                 return -EINVAL;
1251         }
1252         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1253                 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1254                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1255                                 " greater than TCM/SE_Device max_sectors:"
1256                                 " %u\n", dev, fabric_max_sectors,
1257                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1258                          return -EINVAL;
1259                 }
1260         } else {
1261                 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1262                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1263                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1264                                 " %u\n", dev, fabric_max_sectors,
1265                                 DA_STATUS_MAX_SECTORS_MAX);
1266                         return -EINVAL;
1267                 }
1268         }
1269         /*
1270          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1271          */
1272         fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1273                                                       dev->se_sub_dev->se_dev_attrib.block_size);
1274
1275         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
1276         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1277                         dev, fabric_max_sectors);
1278         return 0;
1279 }
1280
1281 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1282 {
1283         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1284                 pr_err("dev[%p]: Unable to change SE Device"
1285                         " optimal_sectors while dev_export_obj: %d count exists\n",
1286                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1287                 return -EINVAL;
1288         }
1289         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1290                 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1291                                 " changed for TCM/pSCSI\n", dev);
1292                 return -EINVAL;
1293         }
1294         if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
1295                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1296                         " greater than fabric_max_sectors: %u\n", dev,
1297                         optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
1298                 return -EINVAL;
1299         }
1300
1301         dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1302         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1303                         dev, optimal_sectors);
1304         return 0;
1305 }
1306
1307 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1308 {
1309         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1310                 pr_err("dev[%p]: Unable to change SE Device block_size"
1311                         " while dev_export_obj: %d count exists\n", dev,
1312                         atomic_read(&dev->dev_export_obj.obj_access_count));
1313                 return -EINVAL;
1314         }
1315
1316         if ((block_size != 512) &&
1317             (block_size != 1024) &&
1318             (block_size != 2048) &&
1319             (block_size != 4096)) {
1320                 pr_err("dev[%p]: Illegal value for block_device: %u"
1321                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1322                         dev, block_size);
1323                 return -EINVAL;
1324         }
1325
1326         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1327                 pr_err("dev[%p]: Not allowed to change block_size for"
1328                         " Physical Device, use for Linux/SCSI to change"
1329                         " block_size for underlying hardware\n", dev);
1330                 return -EINVAL;
1331         }
1332
1333         dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1334         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1335                         dev, block_size);
1336         return 0;
1337 }
1338
1339 struct se_lun *core_dev_add_lun(
1340         struct se_portal_group *tpg,
1341         struct se_hba *hba,
1342         struct se_device *dev,
1343         u32 lun)
1344 {
1345         struct se_lun *lun_p;
1346         u32 lun_access = 0;
1347         int rc;
1348
1349         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1350                 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1351                         atomic_read(&dev->dev_access_obj.obj_access_count));
1352                 return ERR_PTR(-EACCES);
1353         }
1354
1355         lun_p = core_tpg_pre_addlun(tpg, lun);
1356         if (IS_ERR(lun_p))
1357                 return lun_p;
1358
1359         if (dev->dev_flags & DF_READ_ONLY)
1360                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1361         else
1362                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1363
1364         rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
1365         if (rc < 0)
1366                 return ERR_PTR(rc);
1367
1368         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1369                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1370                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1371                 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1372         /*
1373          * Update LUN maps for dynamically added initiators when
1374          * generate_node_acl is enabled.
1375          */
1376         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1377                 struct se_node_acl *acl;
1378                 spin_lock_irq(&tpg->acl_node_lock);
1379                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1380                         if (acl->dynamic_node_acl &&
1381                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1382                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1383                                 spin_unlock_irq(&tpg->acl_node_lock);
1384                                 core_tpg_add_node_to_devs(acl, tpg);
1385                                 spin_lock_irq(&tpg->acl_node_lock);
1386                         }
1387                 }
1388                 spin_unlock_irq(&tpg->acl_node_lock);
1389         }
1390
1391         return lun_p;
1392 }
1393
1394 /*      core_dev_del_lun():
1395  *
1396  *
1397  */
1398 int core_dev_del_lun(
1399         struct se_portal_group *tpg,
1400         u32 unpacked_lun)
1401 {
1402         struct se_lun *lun;
1403
1404         lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1405         if (IS_ERR(lun))
1406                 return PTR_ERR(lun);
1407
1408         core_tpg_post_dellun(tpg, lun);
1409
1410         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1411                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1412                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1413                 tpg->se_tpg_tfo->get_fabric_name());
1414
1415         return 0;
1416 }
1417
1418 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1419 {
1420         struct se_lun *lun;
1421
1422         spin_lock(&tpg->tpg_lun_lock);
1423         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1424                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1425                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1426                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1427                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1428                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1429                 spin_unlock(&tpg->tpg_lun_lock);
1430                 return NULL;
1431         }
1432         lun = &tpg->tpg_lun_list[unpacked_lun];
1433
1434         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1435                 pr_err("%s Logical Unit Number: %u is not free on"
1436                         " Target Portal Group: %hu, ignoring request.\n",
1437                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1438                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1439                 spin_unlock(&tpg->tpg_lun_lock);
1440                 return NULL;
1441         }
1442         spin_unlock(&tpg->tpg_lun_lock);
1443
1444         return lun;
1445 }
1446
1447 /*      core_dev_get_lun():
1448  *
1449  *
1450  */
1451 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1452 {
1453         struct se_lun *lun;
1454
1455         spin_lock(&tpg->tpg_lun_lock);
1456         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1457                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1458                         "_TPG-1: %u for Target Portal Group: %hu\n",
1459                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1460                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1461                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1462                 spin_unlock(&tpg->tpg_lun_lock);
1463                 return NULL;
1464         }
1465         lun = &tpg->tpg_lun_list[unpacked_lun];
1466
1467         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1468                 pr_err("%s Logical Unit Number: %u is not active on"
1469                         " Target Portal Group: %hu, ignoring request.\n",
1470                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1471                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1472                 spin_unlock(&tpg->tpg_lun_lock);
1473                 return NULL;
1474         }
1475         spin_unlock(&tpg->tpg_lun_lock);
1476
1477         return lun;
1478 }
1479
1480 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1481         struct se_portal_group *tpg,
1482         u32 mapped_lun,
1483         char *initiatorname,
1484         int *ret)
1485 {
1486         struct se_lun_acl *lacl;
1487         struct se_node_acl *nacl;
1488
1489         if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1490                 pr_err("%s InitiatorName exceeds maximum size.\n",
1491                         tpg->se_tpg_tfo->get_fabric_name());
1492                 *ret = -EOVERFLOW;
1493                 return NULL;
1494         }
1495         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1496         if (!nacl) {
1497                 *ret = -EINVAL;
1498                 return NULL;
1499         }
1500         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1501         if (!lacl) {
1502                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1503                 *ret = -ENOMEM;
1504                 return NULL;
1505         }
1506
1507         INIT_LIST_HEAD(&lacl->lacl_list);
1508         lacl->mapped_lun = mapped_lun;
1509         lacl->se_lun_nacl = nacl;
1510         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1511
1512         return lacl;
1513 }
1514
1515 int core_dev_add_initiator_node_lun_acl(
1516         struct se_portal_group *tpg,
1517         struct se_lun_acl *lacl,
1518         u32 unpacked_lun,
1519         u32 lun_access)
1520 {
1521         struct se_lun *lun;
1522         struct se_node_acl *nacl;
1523
1524         lun = core_dev_get_lun(tpg, unpacked_lun);
1525         if (!lun) {
1526                 pr_err("%s Logical Unit Number: %u is not active on"
1527                         " Target Portal Group: %hu, ignoring request.\n",
1528                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1529                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1530                 return -EINVAL;
1531         }
1532
1533         nacl = lacl->se_lun_nacl;
1534         if (!nacl)
1535                 return -EINVAL;
1536
1537         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1538             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1539                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1540
1541         lacl->se_lun = lun;
1542
1543         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1544                         lun_access, nacl, tpg, 1) < 0)
1545                 return -EINVAL;
1546
1547         spin_lock(&lun->lun_acl_lock);
1548         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1549         atomic_inc(&lun->lun_acl_count);
1550         smp_mb__after_atomic_inc();
1551         spin_unlock(&lun->lun_acl_lock);
1552
1553         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1554                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1555                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1556                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1557                 lacl->initiatorname);
1558         /*
1559          * Check to see if there are any existing persistent reservation APTPL
1560          * pre-registrations that need to be enabled for this LUN ACL..
1561          */
1562         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1563         return 0;
1564 }
1565
1566 /*      core_dev_del_initiator_node_lun_acl():
1567  *
1568  *
1569  */
1570 int core_dev_del_initiator_node_lun_acl(
1571         struct se_portal_group *tpg,
1572         struct se_lun *lun,
1573         struct se_lun_acl *lacl)
1574 {
1575         struct se_node_acl *nacl;
1576
1577         nacl = lacl->se_lun_nacl;
1578         if (!nacl)
1579                 return -EINVAL;
1580
1581         spin_lock(&lun->lun_acl_lock);
1582         list_del(&lacl->lacl_list);
1583         atomic_dec(&lun->lun_acl_count);
1584         smp_mb__after_atomic_dec();
1585         spin_unlock(&lun->lun_acl_lock);
1586
1587         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1588                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1589
1590         lacl->se_lun = NULL;
1591
1592         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1593                 " InitiatorNode: %s Mapped LUN: %u\n",
1594                 tpg->se_tpg_tfo->get_fabric_name(),
1595                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1596                 lacl->initiatorname, lacl->mapped_lun);
1597
1598         return 0;
1599 }
1600
1601 void core_dev_free_initiator_node_lun_acl(
1602         struct se_portal_group *tpg,
1603         struct se_lun_acl *lacl)
1604 {
1605         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1606                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1607                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1608                 tpg->se_tpg_tfo->get_fabric_name(),
1609                 lacl->initiatorname, lacl->mapped_lun);
1610
1611         kfree(lacl);
1612 }
1613
1614 int core_dev_setup_virtual_lun0(void)
1615 {
1616         struct se_hba *hba;
1617         struct se_device *dev;
1618         struct se_subsystem_dev *se_dev = NULL;
1619         struct se_subsystem_api *t;
1620         char buf[16];
1621         int ret;
1622
1623         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1624         if (IS_ERR(hba))
1625                 return PTR_ERR(hba);
1626
1627         lun0_hba = hba;
1628         t = hba->transport;
1629
1630         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1631         if (!se_dev) {
1632                 pr_err("Unable to allocate memory for"
1633                                 " struct se_subsystem_dev\n");
1634                 ret = -ENOMEM;
1635                 goto out;
1636         }
1637         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1638         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1639         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1640         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1641         spin_lock_init(&se_dev->t10_pr.registration_lock);
1642         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1643         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1644         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1645         spin_lock_init(&se_dev->se_dev_lock);
1646         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1647         se_dev->t10_wwn.t10_sub_dev = se_dev;
1648         se_dev->t10_alua.t10_sub_dev = se_dev;
1649         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1650         se_dev->se_dev_hba = hba;
1651
1652         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1653         if (!se_dev->se_dev_su_ptr) {
1654                 pr_err("Unable to locate subsystem dependent pointer"
1655                         " from allocate_virtdevice()\n");
1656                 ret = -ENOMEM;
1657                 goto out;
1658         }
1659         lun0_su_dev = se_dev;
1660
1661         memset(buf, 0, 16);
1662         sprintf(buf, "rd_pages=8");
1663         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1664
1665         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1666         if (IS_ERR(dev)) {
1667                 ret = PTR_ERR(dev);
1668                 goto out;
1669         }
1670         se_dev->se_dev_ptr = dev;
1671         g_lun0_dev = dev;
1672
1673         return 0;
1674 out:
1675         lun0_su_dev = NULL;
1676         kfree(se_dev);
1677         if (lun0_hba) {
1678                 core_delete_hba(lun0_hba);
1679                 lun0_hba = NULL;
1680         }
1681         return ret;
1682 }
1683
1684
1685 void core_dev_release_virtual_lun0(void)
1686 {
1687         struct se_hba *hba = lun0_hba;
1688         struct se_subsystem_dev *su_dev = lun0_su_dev;
1689
1690         if (!hba)
1691                 return;
1692
1693         if (g_lun0_dev)
1694                 se_free_virtual_device(g_lun0_dev, hba);
1695
1696         kfree(su_dev);
1697         core_delete_hba(hba);
1698 }