summaryrefslogtreecommitdiffstats
path: root/drivers/target/target_core_device.c
blob: 5da051a07fa30a0103fa95f00d2d757b881ac82b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
/*******************************************************************************
 * Filename:  target_core_device.c (based on iscsi_target_device.c)
 *
 * This file contains the iSCSI Virtual Device and Disk Transport
 * agnostic related functions.
 *
 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
 * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
 * Copyright (c) 2007-2010 Rising Tide Systems
 * Copyright (c) 2008-2010 Linux-iSCSI.org
 *
 * Nicholas A. Bellinger <nab@kernel.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ******************************************************************************/

#include <linux/net.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/kthread.h>
#include <linux/in.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <scsi/scsi.h>

#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>

#include "target_core_alua.h"
#include "target_core_hba.h"
#include "target_core_pr.h"
#include "target_core_ua.h"

static void se_dev_start(struct se_device *dev);
static void se_dev_stop(struct se_device *dev);

int transport_get_lun_for_cmd(
	struct se_cmd *se_cmd,
	unsigned char *cdb,
	u32 unpacked_lun)
{
	struct se_dev_entry *deve;
	struct se_lun *se_lun = NULL;
	struct se_session *se_sess = SE_SESS(se_cmd);
	unsigned long flags;
	int read_only = 0;

	spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
	deve = se_cmd->se_deve =
			&SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
		if (se_cmd) {
			deve->total_cmds++;
			deve->total_bytes += se_cmd->data_length;

			if (se_cmd->data_direction == DMA_TO_DEVICE) {
				if (deve->lun_flags &
						TRANSPORT_LUNFLAGS_READ_ONLY) {
					read_only = 1;
					goto out;
				}
				deve->write_bytes += se_cmd->data_length;
			} else if (se_cmd->data_direction ==
				   DMA_FROM_DEVICE) {
				deve->read_bytes += se_cmd->data_length;
			}
		}
		deve->deve_cmds++;

		se_lun = se_cmd->se_lun = deve->se_lun;
		se_cmd->pr_res_key = deve->pr_res_key;
		se_cmd->orig_fe_lun = unpacked_lun;
		se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
	}
out:
	spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);

	if (!se_lun) {
		if (read_only) {
			se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
			printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
				" Access for 0x%08x\n",
				CMD_TFO(se_cmd)->get_fabric_name(),
				unpacked_lun);
			return -1;
		} else {
			/*
			 * Use the se_portal_group->tpg_virt_lun0 to allow for
			 * REPORT_LUNS, et al to be returned when no active
			 * MappedLUN=0 exists for this Initiator Port.
			 */
			if (unpacked_lun != 0) {
				se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
				se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
				printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
					" Access for 0x%08x\n",
					CMD_TFO(se_cmd)->get_fabric_name(),
					unpacked_lun);
				return -1;
			}
			/*
			 * Force WRITE PROTECT for virtual LUN 0
			 */
			if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
			    (se_cmd->data_direction != DMA_NONE)) {
				se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
				se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
				return -1;
			}
#if 0
			printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
				CMD_TFO(se_cmd)->get_fabric_name());
#endif
			se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
			se_cmd->orig_fe_lun = 0;
			se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
			se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
		}
	}
	/*
	 * Determine if the struct se_lun is online.
	 */
/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
		return -1;
	}

	{
	struct se_device *dev = se_lun->lun_se_dev;
	spin_lock(&dev->stats_lock);
	dev->num_cmds++;
	if (se_cmd->data_direction == DMA_TO_DEVICE)
		dev->write_bytes += se_cmd->data_length;
	else if (se_cmd->data_direction == DMA_FROM_DEVICE)
		dev->read_bytes += se_cmd->data_length;
	spin_unlock(&dev->stats_lock);
	}

	/*
	 * Add the iscsi_cmd_t to the struct se_lun's cmd list.  This list is used
	 * for tracking state of struct se_cmds during LUN shutdown events.
	 */
	spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
	list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
	atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
#if 0
	printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
		CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
#endif
	spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);

	return 0;
}
EXPORT_SYMBOL(transport_get_lun_for_cmd);

int transport_get_lun_for_tmr(
	struct se_cmd *se_cmd,
	u32 unpacked_lun)
{
	struct se_device *dev = NULL;
	struct se_dev_entry *deve;
	struct se_lun *se_lun = NULL;
	struct se_session *se_sess = SE_SESS(se_cmd);
	struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;

	spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
	deve = se_cmd->se_deve =
			&SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
		se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
		dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
		se_cmd->pr_res_key = deve->pr_res_key;
		se_cmd->orig_fe_lun = unpacked_lun;
		se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
/*		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
	}
	spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);

	if (!se_lun) {
		printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
			" Access for 0x%08x\n",
			CMD_TFO(se_cmd)->get_fabric_name(),
			unpacked_lun);
		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
		return -1;
	}
	/*
	 * Determine if the struct se_lun is online.
	 */
/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
		return -1;
	}

	spin_lock(&dev->se_tmr_lock);
	list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
	spin_unlock(&dev->se_tmr_lock);

	return 0;
}
EXPORT_SYMBOL(transport_get_lun_for_tmr);

/*
 * This function is called from core_scsi3_emulate_pro_register_and_move()
 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
 * when a matching rtpi is found.
 */
struct se_dev_entry *core_get_se_deve_from_rtpi(
	struct se_node_acl *nacl,
	u16 rtpi)
{
	struct se_dev_entry *deve;
	struct se_lun *lun;
	struct se_port *port;
	struct se_portal_group *tpg = nacl->se_tpg;
	u32 i;

	spin_lock_irq(&nacl->device_list_lock);
	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
		deve = &nacl->device_list[i];

		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
			continue;

		lun = deve->se_lun;
		if (!(lun)) {
			printk(KERN_ERR "%s device entries device pointer is"
				" NULL, but Initiator has access.\n",
				TPG_TFO(tpg)->get_fabric_name());
			continue;
		}
		port = lun->lun_sep;
		if (!(port)) {
			printk(KERN_ERR "%s device entries device pointer is"
				" NULL, but Initiator has access.\n",
				TPG_TFO(tpg)->get_fabric_name());
			continue;
		}
		if (port->sep_rtpi != rtpi)
			continue;

		atomic_inc(&deve->pr_ref_count);
		smp_mb__after_atomic_inc();
		spin_unlock_irq(&nacl->device_list_lock);

		return deve;
	}
	spin_unlock_irq(&nacl->device_list_lock);

	return NULL;
}

int core_free_device_list_for_node(
	struct se_node_acl *nacl,
	struct se_portal_group *tpg)
{
	struct se_dev_entry *deve;
	struct se_lun *lun;
	u32 i;

	if (!nacl->device_list)
		return 0;

	spin_lock_irq(&nacl->device_list_lock);
	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
		deve = &nacl->device_list[i];

		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
			continue;

		if (!deve->se_lun) {
			printk(KERN_ERR "%s device entries device pointer is"
				" NULL, but Initiator has access.\n",
				TPG_TFO(tpg)->get_fabric_name());
			continue;
		}
		lun = deve->se_lun;

		spin_unlock_irq(&nacl->device_list_lock);
		core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
			TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
		spin_lock_irq(&nacl->device_list_lock);
	}
	spin_unlock_irq(&nacl->device_list_lock);

	kfree(nacl->device_list);
	nacl->device_list = NULL;

	return 0;
}

void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
{
	struct se_dev_entry *deve;

	spin_lock_irq(&se_nacl->device_list_lock);
	deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
	deve->deve_cmds--;
	spin_unlock_irq(&se_nacl->device_list_lock);

	return;
}

void core_update_device_list_access(
	u32 mapped_lun,
	u32 lun_access,
	struct se_node_acl *nacl)
{
	struct se_dev_entry *deve;

	spin_lock_irq(&nacl->device_list_lock);
	deve = &nacl->device_list[mapped_lun];
	if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
		deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
		deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
	} else {
		deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
		deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
	}
	spin_unlock_irq(&nacl->device_list_lock);

	return;
}

/*      core_update_device_list_for_node():
 *
 *
 */
int core_update_device_list_for_node(
	struct se_lun *lun,
	struct se_lun_acl *lun_acl,
	u32 mapped_lun,
	u32 lun_access,
	struct se_node_acl *nacl,
	struct se_portal_group *tpg,
	int enable)
{
	struct se_port *port = lun->lun_sep;
	struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
	int trans = 0;
	/*
	 * If the MappedLUN entry is being disabled, the entry in
	 * port->sep_alua_list must be removed now before clearing the
	 * struct se_dev_entry pointers below as logic in
	 * core_alua_do_transition_tg_pt() depends on these being present.
	 */
	if (!(enable)) {
		/*
		 * deve->se_lun_acl will be NULL for demo-mode created LUNs
		 * that have not been explictly concerted to MappedLUNs ->
		 * struct se_lun_acl, but we remove deve->alua_port_list from
		 * port->sep_alua_list. This also means that active UAs and
		 * NodeACL context specific PR metadata for demo-mode
		 * MappedLUN *deve will be released below..
		 */
		spin_lock_bh(&port->sep_alua_lock);
		list_del(&deve->alua_port_list);
		spin_unlock_bh(&port->sep_alua_lock);
	}

	spin_lock_irq(&nacl->device_list_lock);
	if (enable) {
		/*
		 * Check if the call is handling demo mode -> explict LUN ACL
		 * transition.  This transition must be for the same struct se_lun
		 * + mapped_lun that was setup in demo mode..
		 */
		if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
			if (deve->se_lun_acl != NULL) {
				printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
					" already set for demo mode -> explict"
					" LUN ACL transition\n");
				spin_unlock_irq(&nacl->device_list_lock);
				return -1;
			}
			if (deve->se_lun != lun) {
				printk(KERN_ERR "struct se_dev_entry->se_lun does"
					" match passed struct se_lun for demo mode"
					" -> explict LUN ACL transition\n");
				spin_unlock_irq(&nacl->device_list_lock);
				return -1;
			}
			deve->se_lun_acl = lun_acl;
			trans = 1;
		} else {
			deve->se_lun = lun;
			deve->se_lun_acl = lun_acl;
			deve->mapped_lun = mapped_lun;
			deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
		}

		if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
			deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
			deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
		} else {
			deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
			deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
		}

		if (trans) {
			spin_unlock_irq(&nacl->device_list_lock);
			return 0;
		}
		deve->creation_time = get_jiffies_64();
		deve->attach_count++;
		spin_unlock_irq(&nacl->device_list_lock);

		spin_lock_bh(&port->sep_alua_lock);
		list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
		spin_unlock_bh(&port->sep_alua_lock);

		return 0;
	}
	/*
	 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
	 * PR operation to complete.
	 */
	spin_unlock_irq(&nacl->device_list_lock);
	while (atomic_read(&deve->pr_ref_count) != 0)
		cpu_relax();
	spin_lock_irq(&nacl->device_list_lock);
	/*
	 * Disable struct se_dev_entry LUN ACL mapping
	 */
	core_scsi3_ua_release_all(deve);
	deve->se_lun = NULL;
	deve->se_lun_acl = NULL;
	deve->lun_flags = 0;
	deve->creation_time = 0;
	deve->attach_count--;
	spin_unlock_irq(&nacl->device_list_lock);

	core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
	return 0;
}

/*      core_clear_lun_from_tpg():
 *
 *
 */
void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
{
	struct se_node_acl *nacl;
	struct se_dev_entry *deve;
	u32 i;

	spin_lock_bh(&tpg->acl_node_lock);
	list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
		spin_unlock_bh(&tpg->acl_node_lock);

		spin_lock_irq(&nacl->device_list_lock);
		for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
			deve = &nacl->device_list[i];
			if (lun != deve->se_lun)
				continue;
			spin_unlock_irq(&nacl->device_list_lock);

			core_update_device_list_for_node(lun, NULL,
				deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
				nacl, tpg, 0);

			spin_lock_irq(&nacl->device_list_lock);
		}
		spin_unlock_irq(&nacl->device_list_lock);

		spin_lock_bh(&tpg->acl_node_lock);
	}
	spin_unlock_bh(&tpg->acl_node_lock);

	return;
}

static struct se_port *core_alloc_port(struct se_device *dev)
{
	struct se_port *port, *port_tmp;

	port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
	if (!(port)) {
		printk(KERN_ERR "Unable to allocate struct se_port\n");
		return NULL;
	}
	INIT_LIST_HEAD(&port->sep_alua_list);
	INIT_LIST_HEAD(&port->sep_list);
	atomic_set(&port->sep_tg_pt_secondary_offline, 0);
	spin_lock_init(&port->sep_alua_lock);
	mutex_init(&port->sep_tg_pt_md_mutex);

	spin_lock(&dev->se_port_lock);
	if (dev->dev_port_count == 0x0000ffff) {
		printk(KERN_WARNING "Reached dev->dev_port_count =="
				" 0x0000ffff\n");
		spin_unlock(&dev->se_port_lock);
		return NULL;
	}
again:
	/*
	 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
	 * Here is the table from spc4r17 section 7.7.3.8.
	 *
	 *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
	 *
	 * Code      Description
	 * 0h        Reserved
	 * 1h        Relative port 1, historically known as port A
	 * 2h        Relative port 2, historically known as port B
	 * 3h to FFFFh    Relative port 3 through 65 535
	 */
	port->sep_rtpi = dev->dev_rpti_counter++;
	if (!(port->sep_rtpi))
		goto again;

	list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
		/*
		 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
		 * for 16-bit wrap..
		 */
		if (port->sep_rtpi == port_tmp->sep_rtpi)
			goto again;
	}
	spin_unlock(&dev->se_port_lock);

	return port;
}

static void core_export_port(
	struct se_device *dev,
	struct se_portal_group *tpg,
	struct se_port *port,
	struct se_lun *lun)
{
	struct se_subsystem_dev *su_dev = SU_DEV(dev);
	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;

	spin_lock(&dev->se_port_lock);
	spin_lock(&lun->lun_sep_lock);
	port->sep_tpg = tpg;
	port->sep_lun = lun;
	lun->lun_sep = port;
	spin_unlock(&lun->lun_sep_lock);

	list_add_tail(&port->sep_list, &dev->dev_sep_list);
	spin_unlock(&dev->se_port_lock);

	if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
		tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
		if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
			printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
					"_gp_member_t\n");
			return;
		}
		spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
		__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
			T10_ALUA(su_dev)->default_tg_pt_gp);
		spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
		printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
			" Group: alua/default_tg_pt_gp\n",
			TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
	}

	dev->dev_port_count++;
	port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
}

/*
 *	Called with struct se_device->se_port_lock spinlock held.
 */
static void core_release_port(struct se_device *dev, struct se_port *port)
{
	/*
	 * Wait for any port reference for PR ALL_TG_PT=1 operation
	 * to complete in __core_scsi3_alloc_registration()
	 */
	spin_unlock(&dev->se_port_lock);
	if (atomic_read(&port->sep_tg_pt_ref_cnt))
		cpu_relax();
	spin_lock(&dev->se_port_lock);

	core_alua_free_tg_pt_gp_mem(port);

	list_del(&port->sep_list);
	dev->dev_port_count--;
	kfree(port);

	return;
}

int core_dev_export(
	struct se_device *dev,
	struct se_portal_group *tpg,
	struct se_lun *lun)
{
	struct se_port *port;

	port = core_alloc_port(dev);
	if (!(port))
		return -1;

	lun->lun_se_dev = dev;
	se_dev_start(dev);

	atomic_inc(&dev->dev_export_obj.obj_access_count);
	core_export_port(dev, tpg, port, lun);
	return 0;
}

void core_dev_unexport(
	struct se_device *dev,
	struct se_portal_group *tpg,
	struct se_lun *lun)
{
	struct se_port *port = lun->lun_sep;

	spin_lock(&lun->lun_sep_lock);
	if (lun->lun_se_dev == NULL) {
		spin_unlock(&lun->lun_sep_lock);
		return;
	}
	spin_unlock(&lun->lun_sep_lock);

	spin_lock(&dev->se_port_lock);
	atomic_dec(&dev->dev_export_obj.obj_access_count);
	core_release_port(dev, port);
	spin_unlock(&dev->se_port_lock);

	se_dev_stop(dev);
	lun->lun_se_dev = NULL;
}

int transport_core_report_lun_response(struct se_cmd *se_cmd)
{
	struct se_dev_entry *deve;
	struct se_lun *se_lun;
	struct se_session *se_sess = SE_SESS(se_cmd);
	struct se_task *se_task;
	unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
	u32 cdb_offset = 0, lun_count = 0, offset = 8;
	u64 i, lun;

	list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
		break;

	if (!(se_task)) {
		printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
		return PYX_TRANSPORT_LU_COMM_FAILURE;
	}

	/*
	 * If no struct se_session pointer is present, this struct se_cmd is
	 * coming via a target_core_mod PASSTHROUGH op, and not through
	 * a $FABRIC_MOD.  In that case, report LUN=0 only.
	 */
	if (!(se_sess)) {
		lun = 0;
		buf[offset++] = ((lun >> 56) & 0xff);
		buf[offset++] = ((lun >> 48) & 0xff);
		buf[offset++] = ((lun >> 40) & 0xff);
		buf[offset++] = ((lun >> 32) & 0xff);
		buf[offset++] = ((lun >> 24) & 0xff);
		buf[offset++] = ((lun >> 16) & 0xff);
		buf[offset++] = ((lun >> 8) & 0xff);
		buf[offset++] = (lun & 0xff);
		lun_count = 1;
		goto done;
	}

	spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
		deve = &SE_NODE_ACL(se_sess)->device_list[i];
		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
			continue;
		se_lun = deve->se_lun;
		/*
		 * We determine the correct LUN LIST LENGTH even once we
		 * have reached the initial allocation length.
		 * See SPC2-R20 7.19.
		 */
		lun_count++;
		if ((cdb_offset + 8) >= se_cmd->data_length)
			continue;

		lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
		buf[offset++] = ((lun >> 56) & 0xff);
		buf[offset++] = ((lun >> 48) & 0xff);
		buf[offset++] = ((lun >> 40) & 0xff);
		buf[offset++] = ((lun >> 32) & 0xff);
		buf[offset++] = ((lun >> 24) & 0xff);
		buf[offset++] = ((lun >> 16) & 0xff);
		buf[offset++] = ((lun >> 8) & 0xff);
		buf[offset++] = (lun & 0xff);
		cdb_offset += 8;
	}
	spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);

	/*
	 * See SPC3 r07, page 159.
	 */
done:
	lun_count *= 8;
	buf[0] = ((lun_count >> 24) & 0xff);
	buf[1] = ((lun_count >> 16) & 0xff);
	buf[2] = ((lun_count >> 8) & 0xff);
	buf[3] = (lun_count & 0xff);

	return PYX_TRANSPORT_SENT_TO_TRANSPORT;
}

/*	se_release_device_for_hba():
 *
 *
 */
void se_release_device_for_hba(struct se_device *dev)
{
	struct se_hba *hba = dev->se_hba;

	if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
	    (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
	    (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
		se_dev_stop(dev);

	if (dev->dev_ptr) {
		kthread_stop(dev->process_thread);
		if (dev->transport->free_device)
			dev->transport->free_device(dev->dev_ptr);
	}

	spin_lock(&hba->device_lock);
	list_del(&dev->dev_list);
	hba->dev_count--;
	spin_unlock(&hba->device_lock);

	core_scsi3_free_all_registrations(dev);
	se_release_vpd_for_dev(dev);

	kfree(dev->dev_status_queue_obj);
	kfree(dev->dev_queue_obj);
	kfree(dev);

	return;
}

void se_release_vpd_for_dev(struct se_device *dev)
{
	struct t10_vpd *vpd, *vpd_tmp;

	spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
	list_for_each_entry_safe(vpd, vpd_tmp,
			&DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
		list_del(&vpd->vpd_list);
		kfree(vpd);
	}
	spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);

	return;
}

/*
 * Called with struct se_hba->device_lock held.
 */
void se_clear_dev_ports(struct se_device *dev)
{
	struct se_hba *hba = dev->se_hba;
	struct se_lun *lun;
	struct se_portal_group *tpg;
	struct se_port *sep, *sep_tmp;

	spin_lock(&dev->se_port_lock);
	list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
		spin_unlock(&dev->se_port_lock);
		spin_unlock(&hba->device_lock);

		lun = sep->sep_lun;
		tpg = sep->sep_tpg;
		spin_lock(&lun->lun_sep_lock);
		if (lun->lun_se_dev == NULL) {
			spin_unlock(&lun->lun_sep_lock);
			continue;
		}
		spin_unlock(&lun->lun_sep_lock);

		core_dev_del_lun(tpg, lun->unpacked_lun);

		spin_lock(&hba->device_lock);
		spin_lock(&dev->se_port_lock);
	}
	spin_unlock(&dev->se_port_lock);

	return;
}

/*	se_free_virtual_device():
 *
 *	Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
 */
int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
{
	spin_lock(&hba->device_lock);
	se_clear_dev_ports(dev);
	spin_unlock(&hba->device_lock);

	core_alua_free_lu_gp_mem(dev);
	se_release_device_for_hba(dev);

	return 0;
}

static void se_dev_start(struct se_device *dev)
{
	struct se_hba *hba = dev->se_hba;

	spin_lock(&hba->device_lock);
	atomic_inc(&dev->dev_obj.obj_access_count);
	if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
		if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
			dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
			dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
		} else if (dev->dev_status &
			   TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
			dev->dev_status &=
				~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
		}
	}
	spin_unlock(&hba->device_lock);
}

static void se_dev_stop(struct se_device *dev)
{
	struct se_hba *hba = dev->se_hba;

	spin_lock(&hba->device_lock);
	atomic_dec(&dev->dev_obj.obj_access_count);
	if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
		if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
			dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
			dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
		} else if (dev->dev_status &
			   TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
			dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
		}
	}
	spin_unlock(&hba->device_lock);
}

int se_dev_check_online(struct se_device *dev)
{
	int ret;

	spin_lock_irq(&dev->dev_status_lock);
	ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
	       (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
	spin_unlock_irq(&dev->dev_status_lock);

	return ret;
}

int se_dev_check_shutdown(struct se_device *dev)
{
	int ret;

	spin_lock_irq(&dev->dev_status_lock);
	ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
	spin_unlock_irq(&dev->dev_status_lock);

	return ret;
}

void se_dev_set_default_attribs(
	struct se_device *dev,
	struct se_dev_limits *dev_limits)
{
	struct queue_limits *limits = &dev_limits->limits;

	DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
	DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
	DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
	DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
	DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
	DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
	DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
	DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
	DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
	DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
	DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
	/*
	 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
	 * iblock_create_virtdevice() from struct queue_limits values
	 * if blk_queue_discard()==1
	 */
	DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
	DEV_ATTRIB(dev)->max_unmap_block_desc_count =
				DA_MAX_UNMAP_BLOCK_DESC_COUNT;
	DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
	DEV_ATTRIB(dev)->unmap_granularity_alignment =
				DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
	/*
	 * block_size is based on subsystem plugin dependent requirements.
	 */
	DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
	DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
	/*
	 * max_sectors is based on subsystem plugin dependent requirements.
	 */
	DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
	DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
	/*
	 * Set optimal_sectors from max_sectors, which can be lowered via
	 * configfs.
	 */
	DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
	/*
	 * queue_depth is based on subsystem plugin dependent requirements.
	 */
	DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
	DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
}

int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
{
	if (task_timeout > DA_TASK_TIMEOUT_MAX) {
		printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
			" DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
		return -1;
	} else {
		DEV_ATTRIB(dev)->task_timeout = task_timeout;
		printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
			dev, task_timeout);
	}

	return 0;
}

int se_dev_set_max_unmap_lba_count(
	struct se_device *dev,
	u32 max_unmap_lba_count)
{
	DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
	printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
			dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
	return 0;
}

int se_dev_set_max_unmap_block_desc_count(
	struct se_device *dev,
	u32 max_unmap_block_desc_count)
{
	DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
	printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
			dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
	return 0;
}

int se_dev_set_unmap_granularity(
	struct se_device *dev,
	u32 unmap_granularity)
{
	DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
	printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
			dev, DEV_ATTRIB(dev)->unmap_granularity);
	return 0;
}

int se_dev_set_unmap_granularity_alignment(
	struct se_device *dev,
	u32 unmap_granularity_alignment)
{
	DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
	printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
			dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
	return 0;
}

int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	if (TRANSPORT(dev)->dpo_emulated == NULL) {
		printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
		return -1;
	}
	if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
		printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_dpo = flag;
	printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
			" bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
	return 0;
}

int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	if (TRANSPORT(dev)->fua_write_emulated == NULL) {
		printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
		return -1;
	}
	if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
		printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_fua_write = flag;
	printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
			dev, DEV_ATTRIB(dev)->emulate_fua_write);
	return 0;
}

int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	if (TRANSPORT(dev)->fua_read_emulated == NULL) {
		printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
		return -1;
	}
	if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
		printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_fua_read = flag;
	printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
			dev, DEV_ATTRIB(dev)->emulate_fua_read);
	return 0;
}

int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	if (TRANSPORT(dev)->write_cache_emulated == NULL) {
		printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
		return -1;
	}
	if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
		printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_write_cache = flag;
	printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
			dev, DEV_ATTRIB(dev)->emulate_write_cache);
	return 0;
}

int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1) && (flag != 2)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}

	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device"
			" UA_INTRLCK_CTRL while dev_export_obj: %d count"
			" exists\n", dev,
			atomic_read(&dev->dev_export_obj.obj_access_count));
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
	printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
		dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);

	return 0;
}

int se_dev_set_emulate_tas(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}

	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
			" dev_export_obj: %d count exists\n", dev,
			atomic_read(&dev->dev_export_obj.obj_access_count));
		return -1;
	}
	DEV_ATTRIB(dev)->emulate_tas = flag;
	printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
		dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");

	return 0;
}

int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	/*
	 * We expect this value to be non-zero when generic Block Layer
	 * Discard supported is detected iblock_create_virtdevice().
	 */
	if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
		printk(KERN_ERR "Generic Block Discard not supported\n");
		return -ENOSYS;
	}

	DEV_ATTRIB(dev)->emulate_tpu = flag;
	printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
				dev, flag);
	return 0;
}

int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	/*
	 * We expect this value to be non-zero when generic Block Layer
	 * Discard supported is detected iblock_create_virtdevice().
	 */
	if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
		printk(KERN_ERR "Generic Block Discard not supported\n");
		return -ENOSYS;
	}

	DEV_ATTRIB(dev)->emulate_tpws = flag;
	printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
				dev, flag);
	return 0;
}

int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
{
	if ((flag != 0) && (flag != 1)) {
		printk(KERN_ERR "Illegal value %d\n", flag);
		return -1;
	}
	DEV_ATTRIB(dev)->enforce_pr_isids = flag;
	printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
		(DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
	return 0;
}

/*
 * Note, this can only be called on unexported SE Device Object.
 */
int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
{
	u32 orig_queue_depth = dev->queue_depth;

	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
			" dev_export_obj: %d count exists\n", dev,
			atomic_read(&dev->dev_export_obj.obj_access_count));
		return -1;
	}
	if (!(queue_depth)) {
		printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
			"_depth\n", dev);
		return -1;
	}

	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
		if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
			printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
				" exceeds TCM/SE_Device TCQ: %u\n",
				dev, queue_depth,
				DEV_ATTRIB(dev)->hw_queue_depth);
			return -1;
		}
	} else {
		if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
			if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
				printk(KERN_ERR "dev[%p]: Passed queue_depth:"
					" %u exceeds TCM/SE_Device MAX"
					" TCQ: %u\n", dev, queue_depth,
					DEV_ATTRIB(dev)->hw_queue_depth);
				return -1;
			}
		}
	}

	DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
	if (queue_depth > orig_queue_depth)
		atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
	else if (queue_depth < orig_queue_depth)
		atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);

	printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
			dev, queue_depth);
	return 0;
}

int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
{
	int force = 0; /* Force setting for VDEVS */

	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device"
			" max_sectors while dev_export_obj: %d count exists\n",
			dev, atomic_read(&dev->dev_export_obj.obj_access_count));
		return -1;
	}
	if (!(max_sectors)) {
		printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
			" max_sectors\n", dev);
		return -1;
	}
	if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
		printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
			" DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
				DA_STATUS_MAX_SECTORS_MIN);
		return -1;
	}
	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
		if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
			printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
				" greater than TCM/SE_Device max_sectors:"
				" %u\n", dev, max_sectors,
				DEV_ATTRIB(dev)->hw_max_sectors);
			 return -1;
		}
	} else {
		if (!(force) && (max_sectors >
				 DEV_ATTRIB(dev)->hw_max_sectors)) {
			printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
				" greater than TCM/SE_Device max_sectors"
				": %u, use force=1 to override.\n", dev,
				max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
			return -1;
		}
		if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
			printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
				" greater than DA_STATUS_MAX_SECTORS_MAX:"
				" %u\n", dev, max_sectors,
				DA_STATUS_MAX_SECTORS_MAX);
			return -1;
		}
	}

	DEV_ATTRIB(dev)->max_sectors = max_sectors;
	printk("dev[%p]: SE Device max_sectors changed to %u\n",
			dev, max_sectors);
	return 0;
}

int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
{
	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device"
			" optimal_sectors while dev_export_obj: %d count exists\n",
			dev, atomic_read(&dev->dev_export_obj.obj_access_count));
		return -EINVAL;
	}
	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
		printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
				" changed for TCM/pSCSI\n", dev);
		return -EINVAL;
	}
	if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
		printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
			" greater than max_sectors: %u\n", dev,
			optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
		return -EINVAL;
	}

	DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
	printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
			dev, optimal_sectors);
	return 0;
}

int se_dev_set_block_size(struct se_device *dev, u32 block_size)
{
	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
		printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
			" while dev_export_obj: %d count exists\n", dev,
			atomic_read(&dev->dev_export_obj.obj_access_count));
		return -1;
	}

	if ((block_size != 512) &&
	    (block_size != 1024) &&
	    (block_size != 2048) &&
	    (block_size != 4096)) {
		printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
			" for SE device, must be 512, 1024, 2048 or 4096\n",
			dev, block_size);
		return -1;
	}

	if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
		printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
			" Physical Device, use for Linux/SCSI to change"
			" block_size for underlying hardware\n", dev);
		return -1;
	}

	DEV_ATTRIB(dev)->block_size = block_size;
	printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
			dev, block_size);
	return 0;
}

struct se_lun *core_dev_add_lun(
	struct se_portal_group *tpg,
	struct se_hba *hba,
	struct se_device *dev,
	u32 lun)
{
	struct se_lun *lun_p;
	u32 lun_access = 0;

	if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
		printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
			atomic_read(&dev->dev_access_obj.obj_access_count));
		return NULL;
	}

	lun_p = core_tpg_pre_addlun(tpg, lun);
	if ((IS_ERR(lun_p)) || !(lun_p))
		return NULL;

	if (dev->dev_flags & DF_READ_ONLY)
		lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
	else
		lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;

	if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
		return NULL;

	printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
		" CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
		TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
		TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
	/*
	 * Update LUN maps for dynamically added initiators when
	 * generate_node_acl is enabled.
	 */
	if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
		struct se_node_acl *acl;
		spin_lock_bh(&tpg->acl_node_lock);
		list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
			if (acl->dynamic_node_acl) {
				spin_unlock_bh(&tpg->acl_node_lock);
				core_tpg_add_node_to_devs(acl, tpg);
				spin_lock_bh(&tpg->acl_node_lock);
			}
		}
		spin_unlock_bh(&tpg->acl_node_lock);
	}

	return lun_p;
}

/*      core_dev_del_lun():
 *
 *
 */
int core_dev_del_lun(
	struct se_portal_group *tpg,
	u32 unpacked_lun)
{
	struct se_lun *lun;
	int ret = 0;

	lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
	if (!(lun))
		return ret;

	core_tpg_post_dellun(tpg, lun);

	printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
		" device object\n", TPG_TFO(tpg)->get_fabric_name(),
		TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
		TPG_TFO(tpg)->get_fabric_name());

	return 0;
}

struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
{
	struct se_lun *lun;

	spin_lock(&tpg->tpg_lun_lock);
	if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
		printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
			"_PER_TPG-1: %u for Target Portal Group: %hu\n",
			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
			TRANSPORT_MAX_LUNS_PER_TPG-1,
			TPG_TFO(tpg)->tpg_get_tag(tpg));
		spin_unlock(&tpg->tpg_lun_lock);
		return NULL;
	}
	lun = &tpg->tpg_lun_list[unpacked_lun];

	if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
		printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
			" Target Portal Group: %hu, ignoring request.\n",
			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
			TPG_TFO(tpg)->tpg_get_tag(tpg));
		spin_unlock(&tpg->tpg_lun_lock);
		return NULL;
	}
	spin_unlock(&tpg->tpg_lun_lock);

	return lun;
}

/*      core_dev_get_lun():
 *
 *
 */
static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
{
	struct se_lun *lun;

	spin_lock(&tpg->tpg_lun_lock);
	if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
		printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
			"_TPG-1: %u for Target Portal Group: %hu\n",
			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
			TRANSPORT_MAX_LUNS_PER_TPG-1,
			TPG_TFO(tpg)->tpg_get_tag(tpg));
		spin_unlock(&tpg->tpg_lun_lock);
		return NULL;
	}
	lun = &tpg->tpg_lun_list[unpacked_lun];

	if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
		printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
			" Target Portal Group: %hu, ignoring request.\n",
			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
			TPG_TFO(tpg)->tpg_get_tag(tpg));
		spin_unlock(&tpg->tpg_lun_lock);
		return NULL;
	}
	spin_unlock(&tpg->tpg_lun_lock);

	return lun;
}

struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
	struct se_portal_group *tpg,
	u32 mapped_lun,
	char *initiatorname,
	int *ret)
{
	struct se_lun_acl *lacl;
	struct se_node_acl *nacl;

	if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
		printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
			TPG_TFO(tpg)->get_fabric_name());
		*ret = -EOVERFLOW;
		return NULL;
	}
	nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
	if (!(nacl)) {
		*ret = -EINVAL;
		return NULL;
	}
	lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
	if (!(lacl)) {
		printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
		*ret = -ENOMEM;
		return NULL;
	}

	INIT_LIST_HEAD(&lacl->lacl_list);
	lacl->mapped_lun = mapped_lun;
	lacl->se_lun_nacl = nacl;
	snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);

	return lacl;
}

int core_dev_add_initiator_node_lun_acl(
	struct se_portal_group *tpg,
	struct se_lun_acl *lacl,
	u32 unpacked_lun,
	u32 lun_access)
{
	struct se_lun *lun;
	struct se_node_acl *nacl;

	lun = core_dev_get_lun(tpg, unpacked_lun);
	if (!(lun)) {
		printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
			" Target Portal Group: %hu, ignoring request.\n",
			TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
			TPG_TFO(tpg)->tpg_get_tag(tpg));
		return -EINVAL;
	}

	nacl = lacl->se_lun_nacl;
	if (!(nacl))
		return -EINVAL;

	if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
	    (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
		lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;

	lacl->se_lun = lun;

	if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
			lun_access, nacl, tpg, 1) < 0)
		return -EINVAL;

	spin_lock(&lun->lun_acl_lock);
	list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
	atomic_inc(&lun->lun_acl_count);
	smp_mb__after_atomic_inc();
	spin_unlock(&lun->lun_acl_lock);

	printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
		" InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
		TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
		(lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
		lacl->initiatorname);
	/*
	 * Check to see if there are any existing persistent reservation APTPL
	 * pre-registrations that need to be enabled for this LUN ACL..
	 */
	core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
	return 0;
}

/*      core_dev_del_initiator_node_lun_acl():
 *
 *
 */
int core_dev_del_initiator_node_lun_acl(
	struct se_portal_group *tpg,
	struct se_lun *lun,
	struct se_lun_acl *lacl)
{
	struct se_node_acl *nacl;

	nacl = lacl->se_lun_nacl;
	if (!(nacl))
		return -EINVAL;

	spin_lock(&lun->lun_acl_lock);
	list_del(&lacl->lacl_list);
	atomic_dec(&lun->lun_acl_count);
	smp_mb__after_atomic_dec();
	spin_unlock(&lun->lun_acl_lock);

	core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
		TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);

	lacl->se_lun = NULL;

	printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
		" InitiatorNode: %s Mapped LUN: %u\n",
		TPG_TFO(tpg)->get_fabric_name(),
		TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
		lacl->initiatorname, lacl->mapped_lun);

	return 0;
}

void core_dev_free_initiator_node_lun_acl(
	struct se_portal_group *tpg,
	struct se_lun_acl *lacl)
{
	printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
		" Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
		TPG_TFO(tpg)->tpg_get_tag(tpg),
		TPG_TFO(tpg)->get_fabric_name(),
		lacl->initiatorname, lacl->mapped_lun);

	kfree(lacl);
}

int core_dev_setup_virtual_lun0(void)
{
	struct se_hba *hba;
	struct se_device *dev;
	struct se_subsystem_dev *se_dev = NULL;
	struct se_subsystem_api *t;
	char buf[16];
	int ret;

	hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
	if (IS_ERR(hba))
		return PTR_ERR(hba);

	se_global->g_lun0_hba = hba;
	t = hba->transport;

	se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
	if (!(se_dev)) {
		printk(KERN_ERR "Unable to allocate memory for"
				" struct se_subsystem_dev\n");
		ret = -ENOMEM;
		goto out;
	}
	INIT_LIST_HEAD(&se_dev->g_se_dev_list);
	INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
	spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
	INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
	INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
	spin_lock_init(&se_dev->t10_reservation.registration_lock);
	spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
	INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
	spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
	spin_lock_init(&se_dev->se_dev_lock);
	se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
	se_dev->t10_wwn.t10_sub_dev = se_dev;
	se_dev->t10_alua.t10_sub_dev = se_dev;
	se_dev->se_dev_attrib.da_sub_dev = se_dev;
	se_dev->se_dev_hba = hba;

	se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
	if (!(se_dev->se_dev_su_ptr)) {
		printk(KERN_ERR "Unable to locate subsystem dependent pointer"
			" from allocate_virtdevice()\n");
		ret = -ENOMEM;
		goto out;
	}
	se_global->g_lun0_su_dev = se_dev;

	memset(buf, 0, 16);
	sprintf(buf, "rd_pages=8");
	t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));

	dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
	if (!(dev) || IS_ERR(dev)) {
		ret = -ENOMEM;
		goto out;
	}
	se_dev->se_dev_ptr = dev;
	se_global->g_lun0_dev = dev;

	return 0;
out:
	se_global->g_lun0_su_dev = NULL;
	kfree(se_dev);
	if (se_global->g_lun0_hba) {
		core_delete_hba(se_global->g_lun0_hba);
		se_global->g_lun0_hba = NULL;
	}
	return ret;
}


void core_dev_release_virtual_lun0(void)
{
	struct se_hba *hba = se_global->g_lun0_hba;
	struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;

	if (!(hba))
		return;

	if (se_global->g_lun0_dev)
		se_free_virtual_device(se_global->g_lun0_dev, hba);

	kfree(su_dev);
	core_delete_hba(hba);
}