aboutsummaryrefslogtreecommitdiff
path: root/include/target/target_core_base.h
blob: 7f5fed3c89e1808f6f2535ea06bb20cdd772b7f6 (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
#ifndef TARGET_CORE_BASE_H
#define TARGET_CORE_BASE_H

#include <linux/in.h>
#include <linux/configfs.h>
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <scsi/scsi_cmnd.h>
#include <net/sock.h>
#include <net/tcp.h>

#define TARGET_CORE_MOD_VERSION		"v4.1.0-rc1-ml"

/* Maximum Number of LUNs per Target Portal Group */
/* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
#define TRANSPORT_MAX_LUNS_PER_TPG		256
/*
 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
 *
 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
 * 16-byte CDBs by default and require an extra allocation for
 * 32-byte CDBs to because of legacy issues.
 *
 * Within TCM Core there are no such legacy limitiations, so we go ahead
 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
 * within all TCM Core and subsystem plugin code.
 */
#define TCM_MAX_COMMAND_SIZE			32
/*
 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
 * defined 96, but the real limit is 252 (or 260 including the header)
 */
#define TRANSPORT_SENSE_BUFFER			SCSI_SENSE_BUFFERSIZE
/* Used by transport_send_check_condition_and_sense() */
#define SPC_SENSE_KEY_OFFSET			2
#define SPC_ASC_KEY_OFFSET			12
#define SPC_ASCQ_KEY_OFFSET			13
#define TRANSPORT_IQN_LEN			224
/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
#define LU_GROUP_NAME_BUF			256
/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
#define TG_PT_GROUP_NAME_BUF			256
/* Used to parse VPD into struct t10_vpd */
#define VPD_TMP_BUF_SIZE			128
/* Used by transport_generic_cmd_sequencer() */
#define READ_BLOCK_LEN          		6
#define READ_CAP_LEN            		8
#define READ_POSITION_LEN       		20
#define INQUIRY_LEN				36
/* Used by transport_get_inquiry_vpd_serial() */
#define INQUIRY_VPD_SERIAL_LEN			254
/* Used by transport_get_inquiry_vpd_device_ident() */
#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN	254

/* struct se_hba->hba_flags */
enum hba_flags_table {
	HBA_FLAGS_INTERNAL_USE	= 0x01,
	HBA_FLAGS_PSCSI_MODE	= 0x02,
};

/* struct se_lun->lun_status */
enum transport_lun_status_table {
	TRANSPORT_LUN_STATUS_FREE = 0,
	TRANSPORT_LUN_STATUS_ACTIVE = 1,
};

/* struct se_portal_group->se_tpg_type */
enum transport_tpg_type_table {
	TRANSPORT_TPG_TYPE_NORMAL = 0,
	TRANSPORT_TPG_TYPE_DISCOVERY = 1,
};

/* Used for generate timer flags */
enum se_task_flags {
	TF_ACTIVE		= (1 << 0),
	TF_SENT			= (1 << 1),
	TF_REQUEST_STOP		= (1 << 2),
};

/* Special transport agnostic struct se_cmd->t_states */
enum transport_state_table {
	TRANSPORT_NO_STATE	= 0,
	TRANSPORT_NEW_CMD	= 1,
	TRANSPORT_WRITE_PENDING	= 3,
	TRANSPORT_PROCESS_WRITE	= 4,
	TRANSPORT_PROCESSING	= 5,
	TRANSPORT_COMPLETE	= 6,
	TRANSPORT_PROCESS_TMR	= 9,
	TRANSPORT_ISTATE_PROCESSING = 11,
	TRANSPORT_NEW_CMD_MAP	= 16,
	TRANSPORT_COMPLETE_QF_WP = 18,
	TRANSPORT_COMPLETE_QF_OK = 19,
};

/* Used for struct se_cmd->se_cmd_flags */
enum se_cmd_flags_table {
	SCF_SUPPORTED_SAM_OPCODE	= 0x00000001,
	SCF_TRANSPORT_TASK_SENSE	= 0x00000002,
	SCF_EMULATED_TASK_SENSE		= 0x00000004,
	SCF_SCSI_DATA_SG_IO_CDB		= 0x00000008,
	SCF_SCSI_CONTROL_SG_IO_CDB	= 0x00000010,
	SCF_SCSI_NON_DATA_CDB		= 0x00000040,
	SCF_SCSI_CDB_EXCEPTION		= 0x00000080,
	SCF_SCSI_RESERVATION_CONFLICT	= 0x00000100,
	SCF_SE_CMD_FAILED		= 0x00000400,
	SCF_SE_LUN_CMD			= 0x00000800,
	SCF_SE_ALLOW_EOO		= 0x00001000,
	SCF_SENT_CHECK_CONDITION	= 0x00004000,
	SCF_OVERFLOW_BIT		= 0x00008000,
	SCF_UNDERFLOW_BIT		= 0x00010000,
	SCF_SENT_DELAYED_TAS		= 0x00020000,
	SCF_ALUA_NON_OPTIMIZED		= 0x00040000,
	SCF_DELAYED_CMD_FROM_SAM_ATTR	= 0x00080000,
	SCF_UNUSED			= 0x00100000,
	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
};

/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
enum transport_lunflags_table {
	TRANSPORT_LUNFLAGS_NO_ACCESS		= 0x00,
	TRANSPORT_LUNFLAGS_INITIATOR_ACCESS	= 0x01,
	TRANSPORT_LUNFLAGS_READ_ONLY		= 0x02,
	TRANSPORT_LUNFLAGS_READ_WRITE		= 0x04,
};

/* struct se_device->dev_status */
enum transport_device_status_table {
	TRANSPORT_DEVICE_ACTIVATED		= 0x01,
	TRANSPORT_DEVICE_DEACTIVATED		= 0x02,
	TRANSPORT_DEVICE_QUEUE_FULL		= 0x04,
	TRANSPORT_DEVICE_SHUTDOWN		= 0x08,
	TRANSPORT_DEVICE_OFFLINE_ACTIVATED	= 0x10,
	TRANSPORT_DEVICE_OFFLINE_DEACTIVATED	= 0x20,
};

/*
 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 * to signal which ASC/ASCQ sense payload should be built.
 */
enum tcm_sense_reason_table {
	TCM_NON_EXISTENT_LUN			= 0x01,
	TCM_UNSUPPORTED_SCSI_OPCODE		= 0x02,
	TCM_INCORRECT_AMOUNT_OF_DATA		= 0x03,
	TCM_UNEXPECTED_UNSOLICITED_DATA		= 0x04,
	TCM_SERVICE_CRC_ERROR			= 0x05,
	TCM_SNACK_REJECTED			= 0x06,
	TCM_SECTOR_COUNT_TOO_MANY		= 0x07,
	TCM_INVALID_CDB_FIELD			= 0x08,
	TCM_INVALID_PARAMETER_LIST		= 0x09,
	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= 0x0a,
	TCM_UNKNOWN_MODE_PAGE			= 0x0b,
	TCM_WRITE_PROTECTED			= 0x0c,
	TCM_CHECK_CONDITION_ABORT_CMD		= 0x0d,
	TCM_CHECK_CONDITION_UNIT_ATTENTION	= 0x0e,
	TCM_CHECK_CONDITION_NOT_READY		= 0x0f,
};

struct se_obj {
	atomic_t obj_access_count;
} ____cacheline_aligned;

/*
 * Used by TCM Core internally to signal if ALUA emulation is enabled or
 * disabled, or running in with TCM/pSCSI passthrough mode
 */
typedef enum {
	SPC_ALUA_PASSTHROUGH,
	SPC2_ALUA_DISABLED,
	SPC3_ALUA_EMULATED
} t10_alua_index_t;

/*
 * Used by TCM Core internally to signal if SAM Task Attribute emulation
 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 */
typedef enum {
	SAM_TASK_ATTR_PASSTHROUGH,
	SAM_TASK_ATTR_UNTAGGED,
	SAM_TASK_ATTR_EMULATED
} t10_task_attr_index_t;

/*
 * Used for target SCSI statistics
 */
typedef enum {
	SCSI_INST_INDEX,
	SCSI_DEVICE_INDEX,
	SCSI_AUTH_INTR_INDEX,
	SCSI_INDEX_TYPE_MAX
} scsi_index_t;

struct se_cmd;

struct t10_alua {
	t10_alua_index_t alua_type;
	/* ALUA Target Port Group ID */
	u16	alua_tg_pt_gps_counter;
	u32	alua_tg_pt_gps_count;
	spinlock_t tg_pt_gps_lock;
	struct se_subsystem_dev *t10_sub_dev;
	/* Used for default ALUA Target Port Group */
	struct t10_alua_tg_pt_gp *default_tg_pt_gp;
	/* Used for default ALUA Target Port Group ConfigFS group */
	struct config_group alua_tg_pt_gps_group;
	int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
	struct list_head tg_pt_gps_list;
} ____cacheline_aligned;

struct t10_alua_lu_gp {
	u16	lu_gp_id;
	int	lu_gp_valid_id;
	u32	lu_gp_members;
	atomic_t lu_gp_shutdown;
	atomic_t lu_gp_ref_cnt;
	spinlock_t lu_gp_lock;
	struct config_group lu_gp_group;
	struct list_head lu_gp_node;
	struct list_head lu_gp_mem_list;
} ____cacheline_aligned;

struct t10_alua_lu_gp_member {
	bool lu_gp_assoc;
	atomic_t lu_gp_mem_ref_cnt;
	spinlock_t lu_gp_mem_lock;
	struct t10_alua_lu_gp *lu_gp;
	struct se_device *lu_gp_mem_dev;
	struct list_head lu_gp_mem_list;
} ____cacheline_aligned;

struct t10_alua_tg_pt_gp {
	u16	tg_pt_gp_id;
	int	tg_pt_gp_valid_id;
	int	tg_pt_gp_alua_access_status;
	int	tg_pt_gp_alua_access_type;
	int	tg_pt_gp_nonop_delay_msecs;
	int	tg_pt_gp_trans_delay_msecs;
	int	tg_pt_gp_pref;
	int	tg_pt_gp_write_metadata;
	/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
#define ALUA_MD_BUF_LEN				1024
	u32	tg_pt_gp_md_buf_len;
	u32	tg_pt_gp_members;
	atomic_t tg_pt_gp_alua_access_state;
	atomic_t tg_pt_gp_ref_cnt;
	spinlock_t tg_pt_gp_lock;
	struct mutex tg_pt_gp_md_mutex;
	struct se_subsystem_dev *tg_pt_gp_su_dev;
	struct config_group tg_pt_gp_group;
	struct list_head tg_pt_gp_list;
	struct list_head tg_pt_gp_mem_list;
} ____cacheline_aligned;

struct t10_alua_tg_pt_gp_member {
	bool tg_pt_gp_assoc;
	atomic_t tg_pt_gp_mem_ref_cnt;
	spinlock_t tg_pt_gp_mem_lock;
	struct t10_alua_tg_pt_gp *tg_pt_gp;
	struct se_port *tg_pt;
	struct list_head tg_pt_gp_mem_list;
} ____cacheline_aligned;

struct t10_vpd {
	unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
	int protocol_identifier_set;
	u32 protocol_identifier;
	u32 device_identifier_code_set;
	u32 association;
	u32 device_identifier_type;
	struct list_head vpd_list;
} ____cacheline_aligned;

struct t10_wwn {
	char vendor[8];
	char model[16];
	char revision[4];
	char unit_serial[INQUIRY_VPD_SERIAL_LEN];
	spinlock_t t10_vpd_lock;
	struct se_subsystem_dev *t10_sub_dev;
	struct config_group t10_wwn_group;
	struct list_head t10_vpd_list;
} ____cacheline_aligned;


/*
 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 * mode
 */
typedef enum {
	SPC_PASSTHROUGH,
	SPC2_RESERVATIONS,
	SPC3_PERSISTENT_RESERVATIONS
} t10_reservations_index_t;

struct t10_pr_registration {
	/* Used for fabrics that contain WWN+ISID */
#define PR_REG_ISID_LEN				16
	/* PR_REG_ISID_LEN + ',i,0x' */
#define PR_REG_ISID_ID_LEN			(PR_REG_ISID_LEN + 5)
	char pr_reg_isid[PR_REG_ISID_LEN];
	/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_IPORT_LEN			256
	unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
	/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_TPORT_LEN			256
	unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
	/* For writing out live meta data */
	unsigned char *pr_aptpl_buf;
	u16 pr_aptpl_rpti;
	u16 pr_reg_tpgt;
	/* Reservation effects all target ports */
	int pr_reg_all_tg_pt;
	/* Activate Persistence across Target Power Loss */
	int pr_reg_aptpl;
	int pr_res_holder;
	int pr_res_type;
	int pr_res_scope;
	/* Used for fabric initiator WWPNs using a ISID */
	bool isid_present_at_reg;
	u32 pr_res_mapped_lun;
	u32 pr_aptpl_target_lun;
	u32 pr_res_generation;
	u64 pr_reg_bin_isid;
	u64 pr_res_key;
	atomic_t pr_res_holders;
	struct se_node_acl *pr_reg_nacl;
	struct se_dev_entry *pr_reg_deve;
	struct se_lun *pr_reg_tg_pt_lun;
	struct list_head pr_reg_list;
	struct list_head pr_reg_abort_list;
	struct list_head pr_reg_aptpl_list;
	struct list_head pr_reg_atp_list;
	struct list_head pr_reg_atp_mem_list;
} ____cacheline_aligned;

/*
 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 * core_setup_reservations()
 */
struct t10_reservation_ops {
	int (*t10_reservation_check)(struct se_cmd *, u32 *);
	int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
	int (*t10_pr_register)(struct se_cmd *);
	int (*t10_pr_clear)(struct se_cmd *);
};

struct t10_reservation {
	/* Reservation effects all target ports */
	int pr_all_tg_pt;
	/* Activate Persistence across Target Power Loss enabled
	 * for SCSI device */
	int pr_aptpl_active;
	/* Used by struct t10_reservation->pr_aptpl_buf_len */
#define PR_APTPL_BUF_LEN			8192
	u32 pr_aptpl_buf_len;
	u32 pr_generation;
	t10_reservations_index_t res_type;
	spinlock_t registration_lock;
	spinlock_t aptpl_reg_lock;
	/*
	 * This will always be set by one individual I_T Nexus.
	 * However with all_tg_pt=1, other I_T Nexus from the
	 * same initiator can access PR reg/res info on a different
	 * target port.
	 *
	 * There is also the 'All Registrants' case, where there is
	 * a single *pr_res_holder of the reservation, but all
	 * registrations are considered reservation holders.
	 */
	struct se_node_acl *pr_res_holder;
	struct list_head registration_list;
	struct list_head aptpl_reg_list;
	struct t10_reservation_ops pr_ops;
} ____cacheline_aligned;

struct se_queue_req {
	int			state;
	struct se_cmd		*cmd;
	struct list_head	qr_list;
} ____cacheline_aligned;

struct se_queue_obj {
	atomic_t		queue_cnt;
	spinlock_t		cmd_queue_lock;
	struct list_head	qobj_list;
	wait_queue_head_t	thread_wq;
} ____cacheline_aligned;

struct se_task {
	unsigned long long	task_lba;
	u32			task_sectors;
	u32			task_size;
	struct se_cmd		*task_se_cmd;
	struct scatterlist	*task_sg;
	u32			task_sg_nents;
	u16			task_flags;
	u8			task_sense;
	u8			task_scsi_status;
	int			task_error_status;
	enum dma_data_direction	task_data_direction;
	atomic_t		task_state_active;
	struct list_head	t_list;
	struct list_head	t_execute_list;
	struct list_head	t_state_list;
	struct completion	task_stop_comp;
} ____cacheline_aligned;

struct se_cmd {
	/* SAM response code being sent to initiator */
	u8			scsi_status;
	u8			scsi_asc;
	u8			scsi_ascq;
	u8			scsi_sense_reason;
	u16			scsi_sense_length;
	/* Delay for ALUA Active/NonOptimized state access in milliseconds */
	int			alua_nonop_delay;
	/* See include/linux/dma-mapping.h */
	enum dma_data_direction	data_direction;
	/* For SAM Task Attribute */
	int			sam_task_attr;
	/* Transport protocol dependent state, see transport_state_table */
	enum transport_state_table t_state;
	/* Transport specific error status */
	int			transport_error_status;
	/* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
	int			check_release:1;
	int			cmd_wait_set:1;
	/* See se_cmd_flags_table */
	u32			se_cmd_flags;
	u32			se_ordered_id;
	/* Total size in bytes associated with command */
	u32			data_length;
	/* SCSI Presented Data Transfer Length */
	u32			cmd_spdtl;
	u32			residual_count;
	u32			orig_fe_lun;
	/* Persistent Reservation key */
	u64			pr_res_key;
	/* Used for sense data */
	void			*sense_buffer;
	struct list_head	se_delayed_node;
	struct list_head	se_ordered_node;
	struct list_head	se_lun_node;
	struct list_head	se_qf_node;
	struct se_device      *se_dev;
	struct se_dev_entry   *se_deve;
	struct se_device	*se_obj_ptr;
	struct se_device	*se_orig_obj_ptr;
	struct se_lun		*se_lun;
	/* Only used for internal passthrough and legacy TCM fabric modules */
	struct se_session	*se_sess;
	struct se_tmr_req	*se_tmr_req;
	struct list_head	se_queue_node;
	struct list_head	se_cmd_list;
	struct completion	cmd_wait_comp;
	struct target_core_fabric_ops *se_tfo;
	int (*execute_task)(struct se_task *);
	void (*transport_complete_callback)(struct se_cmd *);

	unsigned char		*t_task_cdb;
	unsigned char		__t_task_cdb[TCM_MAX_COMMAND_SIZE];
	unsigned long long	t_task_lba;
	int			t_tasks_failed;
	int			t_tasks_fua;
	bool			t_tasks_bidi;
	u32			t_tasks_sg_chained_no;
	atomic_t		t_fe_count;
	atomic_t		t_se_count;
	atomic_t		t_task_cdbs_left;
	atomic_t		t_task_cdbs_ex_left;
	atomic_t		t_task_cdbs_sent;
	atomic_t		t_transport_aborted;
	atomic_t		t_transport_active;
	atomic_t		t_transport_complete;
	atomic_t		t_transport_queue_active;
	atomic_t		t_transport_sent;
	atomic_t		t_transport_stop;
	atomic_t		transport_dev_active;
	atomic_t		transport_lun_active;
	atomic_t		transport_lun_fe_stop;
	atomic_t		transport_lun_stop;
	spinlock_t		t_state_lock;
	struct completion	t_transport_stop_comp;
	struct completion	transport_lun_fe_stop_comp;
	struct completion	transport_lun_stop_comp;
	struct scatterlist	*t_tasks_sg_chained;

	struct work_struct	work;

	/*
	 * Used for pre-registered fabric SGL passthrough WRITE and READ
	 * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
	 * and other HW target mode fabric modules.
	 */
	struct scatterlist	*t_task_pt_sgl;
	u32			t_task_pt_sgl_num;

	struct scatterlist	*t_data_sg;
	unsigned int		t_data_nents;
	struct scatterlist	*t_bidi_data_sg;
	unsigned int		t_bidi_data_nents;

	/* Used for BIDI READ */
	struct list_head	t_task_list;
	u32			t_task_list_num;

} ____cacheline_aligned;

struct se_tmr_req {
	/* Task Management function to be preformed */
	u8			function;
	/* Task Management response to send */
	u8			response;
	int			call_transport;
	/* Reference to ITT that Task Mgmt should be preformed */
	u32			ref_task_tag;
	/* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
	u64			ref_task_lun;
	void 			*fabric_tmr_ptr;
	struct se_cmd		*task_cmd;
	struct se_cmd		*ref_cmd;
	struct se_device	*tmr_dev;
	struct se_lun		*tmr_lun;
	struct list_head	tmr_list;
} ____cacheline_aligned;

struct se_ua {
	u8			ua_asc;
	u8			ua_ascq;
	struct se_node_acl	*ua_nacl;
	struct list_head	ua_dev_list;
	struct list_head	ua_nacl_list;
} ____cacheline_aligned;

struct se_node_acl {
	char			initiatorname[TRANSPORT_IQN_LEN];
	/* Used to signal demo mode created ACL, disabled by default */
	bool			dynamic_node_acl;
	u32			queue_depth;
	u32			acl_index;
	u64			num_cmds;
	u64			read_bytes;
	u64			write_bytes;
	spinlock_t		stats_lock;
	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
	atomic_t		acl_pr_ref_count;
	struct se_dev_entry	*device_list;
	struct se_session	*nacl_sess;
	struct se_portal_group *se_tpg;
	spinlock_t		device_list_lock;
	spinlock_t		nacl_sess_lock;
	struct config_group	acl_group;
	struct config_group	acl_attrib_group;
	struct config_group	acl_auth_group;
	struct config_group	acl_param_group;
	struct config_group	acl_fabric_stat_group;
	struct config_group	*acl_default_groups[5];
	struct list_head	acl_list;
	struct list_head	acl_sess_list;
} ____cacheline_aligned;

struct se_session {
	int			sess_tearing_down:1;
	u64			sess_bin_isid;
	struct se_node_acl	*se_node_acl;
	struct se_portal_group *se_tpg;
	void			*fabric_sess_ptr;
	struct list_head	sess_list;
	struct list_head	sess_acl_list;
	struct list_head	sess_cmd_list;
	struct list_head	sess_wait_list;
	spinlock_t		sess_cmd_lock;
} ____cacheline_aligned;

struct se_device;
struct se_transform_info;
struct scatterlist;

struct se_ml_stat_grps {
	struct config_group	stat_group;
	struct config_group	scsi_auth_intr_group;
	struct config_group	scsi_att_intr_port_group;
};

struct se_lun_acl {
	char			initiatorname[TRANSPORT_IQN_LEN];
	u32			mapped_lun;
	struct se_node_acl	*se_lun_nacl;
	struct se_lun		*se_lun;
	struct list_head	lacl_list;
	struct config_group	se_lun_group;
	struct se_ml_stat_grps	ml_stat_grps;
}  ____cacheline_aligned;

struct se_dev_entry {
	bool			def_pr_registered;
	/* See transport_lunflags_table */
	u32			lun_flags;
	u32			deve_cmds;
	u32			mapped_lun;
	u32			average_bytes;
	u32			last_byte_count;
	u32			total_cmds;
	u32			total_bytes;
	u64			pr_res_key;
	u64			creation_time;
	u32			attach_count;
	u64			read_bytes;
	u64			write_bytes;
	atomic_t		ua_count;
	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
	atomic_t		pr_ref_count;
	struct se_lun_acl	*se_lun_acl;
	spinlock_t		ua_lock;
	struct se_lun		*se_lun;
	struct list_head	alua_port_list;
	struct list_head	ua_list;
}  ____cacheline_aligned;

struct se_dev_limits {
	/* Max supported HW queue depth */
	u32		hw_queue_depth;
	/* Max supported virtual queue depth */
	u32		queue_depth;
	/* From include/linux/blkdev.h for the other HW/SW limits. */
	struct queue_limits limits;
} ____cacheline_aligned;

struct se_dev_attrib {
	int		emulate_dpo;
	int		emulate_fua_write;
	int		emulate_fua_read;
	int		emulate_write_cache;
	int		emulate_ua_intlck_ctrl;
	int		emulate_tas;
	int		emulate_tpu;
	int		emulate_tpws;
	int		emulate_reservations;
	int		emulate_alua;
	int		enforce_pr_isids;
	int		is_nonrot;
	int		emulate_rest_reord;
	u32		hw_block_size;
	u32		block_size;
	u32		hw_max_sectors;
	u32		max_sectors;
	u32		optimal_sectors;
	u32		hw_queue_depth;
	u32		queue_depth;
	u32		max_unmap_lba_count;
	u32		max_unmap_block_desc_count;
	u32		unmap_granularity;
	u32		unmap_granularity_alignment;
	struct se_subsystem_dev *da_sub_dev;
	struct config_group da_group;
} ____cacheline_aligned;

struct se_dev_stat_grps {
	struct config_group stat_group;
	struct config_group scsi_dev_group;
	struct config_group scsi_tgt_dev_group;
	struct config_group scsi_lu_group;
};

struct se_subsystem_dev {
/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
#define SE_DEV_ALIAS_LEN		512
	unsigned char	se_dev_alias[SE_DEV_ALIAS_LEN];
/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
#define SE_UDEV_PATH_LEN		512
	unsigned char	se_dev_udev_path[SE_UDEV_PATH_LEN];
	u32		su_dev_flags;
	struct se_hba *se_dev_hba;
	struct se_device *se_dev_ptr;
	struct se_dev_attrib se_dev_attrib;
	/* T10 Asymmetric Logical Unit Assignment for Target Ports */
	struct t10_alua	t10_alua;
	/* T10 Inquiry and VPD WWN Information */
	struct t10_wwn	t10_wwn;
	/* T10 SPC-2 + SPC-3 Reservations */
	struct t10_reservation t10_pr;
	spinlock_t      se_dev_lock;
	void            *se_dev_su_ptr;
	struct list_head se_dev_node;
	struct config_group se_dev_group;
	/* For T10 Reservations */
	struct config_group se_dev_pr_group;
	/* For target_core_stat.c groups */
	struct se_dev_stat_grps dev_stat_grps;
} ____cacheline_aligned;

struct se_device {
	/* Set to 1 if thread is NOT sleeping on thread_sem */
	u8			thread_active;
	u8			dev_status_timer_flags;
	/* RELATIVE TARGET PORT IDENTIFER Counter */
	u16			dev_rpti_counter;
	/* Used for SAM Task Attribute ordering */
	u32			dev_cur_ordered_id;
	u32			dev_flags;
	u32			dev_port_count;
	/* See transport_device_status_table */
	u32			dev_status;
	u32			dev_tcq_window_closed;
	/* Physical device queue depth */
	u32			queue_depth;
	/* Used for SPC-2 reservations enforce of ISIDs */
	u64			dev_res_bin_isid;
	t10_task_attr_index_t	dev_task_attr_type;
	/* Pointer to transport specific device structure */
	void 			*dev_ptr;
	u32			dev_index;
	u64			creation_time;
	u32			num_resets;
	u64			num_cmds;
	u64			read_bytes;
	u64			write_bytes;
	spinlock_t		stats_lock;
	/* Active commands on this virtual SE device */
	atomic_t		active_cmds;
	atomic_t		simple_cmds;
	atomic_t		depth_left;
	atomic_t		dev_ordered_id;
	atomic_t		dev_tur_active;
	atomic_t		execute_tasks;
	atomic_t		dev_status_thr_count;
	atomic_t		dev_hoq_count;
	atomic_t		dev_ordered_sync;
	atomic_t		dev_qf_count;
	struct se_obj		dev_obj;
	struct se_obj		dev_access_obj;
	struct se_obj		dev_export_obj;
	struct se_queue_obj	dev_queue_obj;
	spinlock_t		delayed_cmd_lock;
	spinlock_t		ordered_cmd_lock;
	spinlock_t		execute_task_lock;
	spinlock_t		state_task_lock;
	spinlock_t		dev_alua_lock;
	spinlock_t		dev_reservation_lock;
	spinlock_t		dev_state_lock;
	spinlock_t		dev_status_lock;
	spinlock_t		dev_status_thr_lock;
	spinlock_t		se_port_lock;
	spinlock_t		se_tmr_lock;
	spinlock_t		qf_cmd_lock;
	/* Used for legacy SPC-2 reservationsa */
	struct se_node_acl	*dev_reserved_node_acl;
	/* Used for ALUA Logical Unit Group membership */
	struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
	/* Used for SPC-3 Persistent Reservations */
	struct t10_pr_registration *dev_pr_res_holder;
	struct list_head	dev_sep_list;
	struct list_head	dev_tmr_list;
	struct timer_list	dev_status_timer;
	/* Pointer to descriptor for processing thread */
	struct task_struct	*process_thread;
	pid_t			process_thread_pid;
	struct task_struct		*dev_mgmt_thread;
	struct work_struct	qf_work_queue;
	struct list_head	delayed_cmd_list;
	struct list_head	ordered_cmd_list;
	struct list_head	execute_task_list;
	struct list_head	state_task_list;
	struct list_head	qf_cmd_list;
	/* Pointer to associated SE HBA */
	struct se_hba		*se_hba;
	struct se_subsystem_dev *se_sub_dev;
	/* Pointer to template of function pointers for transport */
	struct se_subsystem_api *transport;
	/* Linked list for struct se_hba struct se_device list */
	struct list_head	dev_list;
	/* Linked list for struct se_global->g_se_dev_list */
	struct list_head	g_se_dev_list;
}  ____cacheline_aligned;

struct se_hba {
	u16			hba_tpgt;
	u32			hba_id;
	/* See hba_flags_table */
	u32			hba_flags;
	/* Virtual iSCSI devices attached. */
	u32			dev_count;
	u32			hba_index;
	/* Pointer to transport specific host structure. */
	void			*hba_ptr;
	/* Linked list for struct se_device */
	struct list_head	hba_dev_list;
	struct list_head	hba_node;
	spinlock_t		device_lock;
	struct config_group	hba_group;
	struct mutex		hba_access_mutex;
	struct se_subsystem_api *transport;
}  ____cacheline_aligned;

struct se_port_stat_grps {
	struct config_group stat_group;
	struct config_group scsi_port_group;
	struct config_group scsi_tgt_port_group;
	struct config_group scsi_transport_group;
};

struct se_lun {
	/* See transport_lun_status_table */
	enum transport_lun_status_table lun_status;
	u32			lun_access;
	u32			lun_flags;
	u32			unpacked_lun;
	atomic_t		lun_acl_count;
	spinlock_t		lun_acl_lock;
	spinlock_t		lun_cmd_lock;
	spinlock_t		lun_sep_lock;
	struct completion	lun_shutdown_comp;
	struct list_head	lun_cmd_list;
	struct list_head	lun_acl_list;
	struct se_device	*lun_se_dev;
	struct se_port		*lun_sep;
	struct config_group	lun_group;
	struct se_port_stat_grps port_stat_grps;
} ____cacheline_aligned;

struct scsi_port_stats {
       u64     cmd_pdus;
       u64     tx_data_octets;
       u64     rx_data_octets;
} ____cacheline_aligned;

struct se_port {
	/* RELATIVE TARGET PORT IDENTIFER */
	u16		sep_rtpi;
	int		sep_tg_pt_secondary_stat;
	int		sep_tg_pt_secondary_write_md;
	u32		sep_index;
	struct scsi_port_stats sep_stats;
	/* Used for ALUA Target Port Groups membership */
	atomic_t	sep_tg_pt_gp_active;
	atomic_t	sep_tg_pt_secondary_offline;
	/* Used for PR ALL_TG_PT=1 */
	atomic_t	sep_tg_pt_ref_cnt;
	spinlock_t	sep_alua_lock;
	struct mutex	sep_tg_pt_md_mutex;
	struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
	struct se_lun *sep_lun;
	struct se_portal_group *sep_tpg;
	struct list_head sep_alua_list;
	struct list_head sep_list;
} ____cacheline_aligned;

struct se_tpg_np {
	struct se_portal_group *tpg_np_parent;
	struct config_group	tpg_np_group;
} ____cacheline_aligned;

struct se_portal_group {
	/* Type of target portal group, see transport_tpg_type_table */
	enum transport_tpg_type_table se_tpg_type;
	/* Number of ACLed Initiator Nodes for this TPG */
	u32			num_node_acls;
	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
	atomic_t		tpg_pr_ref_count;
	/* Spinlock for adding/removing ACLed Nodes */
	spinlock_t		acl_node_lock;
	/* Spinlock for adding/removing sessions */
	spinlock_t		session_lock;
	spinlock_t		tpg_lun_lock;
	/* Pointer to $FABRIC_MOD portal group */
	void			*se_tpg_fabric_ptr;
	struct list_head	se_tpg_node;
	/* linked list for initiator ACL list */
	struct list_head	acl_node_list;
	struct se_lun		*tpg_lun_list;
	struct se_lun		tpg_virt_lun0;
	/* List of TCM sessions associated wth this TPG */
	struct list_head	tpg_sess_list;
	/* Pointer to $FABRIC_MOD dependent code */
	struct target_core_fabric_ops *se_tpg_tfo;
	struct se_wwn		*se_tpg_wwn;
	struct config_group	tpg_group;
	struct config_group	*tpg_default_groups[6];
	struct config_group	tpg_lun_group;
	struct config_group	tpg_np_group;
	struct config_group	tpg_acl_group;
	struct config_group	tpg_attrib_group;
	struct config_group	tpg_param_group;
} ____cacheline_aligned;

struct se_wwn {
	struct target_fabric_configfs *wwn_tf;
	struct config_group	wwn_group;
	struct config_group	*wwn_default_groups[2];
	struct config_group	fabric_stat_group;
} ____cacheline_aligned;

#endif /* TARGET_CORE_BASE_H */