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