target: remove unused TRANSPORT_ states
[linux-2.6.git] / include / target / target_core_base.h
1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
3
4 #include <linux/in.h>
5 #include <linux/configfs.h>
6 #include <linux/dma-mapping.h>
7 #include <linux/blkdev.h>
8 #include <scsi/scsi_cmnd.h>
9 #include <net/sock.h>
10 #include <net/tcp.h>
11
12 #define TARGET_CORE_MOD_VERSION         "v4.1.0-rc1-ml"
13
14 /* Maximum Number of LUNs per Target Portal Group */
15 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
16 #define TRANSPORT_MAX_LUNS_PER_TPG              256
17 /*
18  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
19  *
20  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
21  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
22  * 16-byte CDBs by default and require an extra allocation for
23  * 32-byte CDBs to because of legacy issues.
24  *
25  * Within TCM Core there are no such legacy limitiations, so we go ahead
26  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
27  * within all TCM Core and subsystem plugin code.
28  */
29 #define TCM_MAX_COMMAND_SIZE                    32
30 /*
31  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
32  * defined 96, but the real limit is 252 (or 260 including the header)
33  */
34 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
35 /* Used by transport_send_check_condition_and_sense() */
36 #define SPC_SENSE_KEY_OFFSET                    2
37 #define SPC_ASC_KEY_OFFSET                      12
38 #define SPC_ASCQ_KEY_OFFSET                     13
39 #define TRANSPORT_IQN_LEN                       224
40 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
41 #define LU_GROUP_NAME_BUF                       256
42 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
43 #define TG_PT_GROUP_NAME_BUF                    256
44 /* Used to parse VPD into struct t10_vpd */
45 #define VPD_TMP_BUF_SIZE                        128
46 /* Used by transport_generic_cmd_sequencer() */
47 #define READ_BLOCK_LEN                          6
48 #define READ_CAP_LEN                            8
49 #define READ_POSITION_LEN                       20
50 #define INQUIRY_LEN                             36
51 /* Used by transport_get_inquiry_vpd_serial() */
52 #define INQUIRY_VPD_SERIAL_LEN                  254
53 /* Used by transport_get_inquiry_vpd_device_ident() */
54 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
55
56 /* struct se_hba->hba_flags */
57 enum hba_flags_table {
58         HBA_FLAGS_INTERNAL_USE  = 0x01,
59         HBA_FLAGS_PSCSI_MODE    = 0x02,
60 };
61
62 /* struct se_lun->lun_status */
63 enum transport_lun_status_table {
64         TRANSPORT_LUN_STATUS_FREE = 0,
65         TRANSPORT_LUN_STATUS_ACTIVE = 1,
66 };
67
68 /* struct se_portal_group->se_tpg_type */
69 enum transport_tpg_type_table {
70         TRANSPORT_TPG_TYPE_NORMAL = 0,
71         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
72 };
73
74 /* Used for generate timer flags */
75 enum se_task_flags {
76         TF_ACTIVE               = (1 << 0),
77         TF_SENT                 = (1 << 1),
78         TF_TIMEOUT              = (1 << 2),
79         TF_REQUEST_STOP         = (1 << 3),
80 };
81
82 /* Special transport agnostic struct se_cmd->t_states */
83 enum transport_state_table {
84         TRANSPORT_NO_STATE      = 0,
85         TRANSPORT_NEW_CMD       = 1,
86         TRANSPORT_WRITE_PENDING = 3,
87         TRANSPORT_PROCESS_WRITE = 4,
88         TRANSPORT_PROCESSING    = 5,
89         TRANSPORT_COMPLETE_OK   = 6,
90         TRANSPORT_COMPLETE_FAILURE = 7,
91         TRANSPORT_COMPLETE_TIMEOUT = 8,
92         TRANSPORT_PROCESS_TMR   = 9,
93         TRANSPORT_ISTATE_PROCESSING = 11,
94         TRANSPORT_NEW_CMD_MAP   = 16,
95         TRANSPORT_FREE_CMD_INTR = 17,
96         TRANSPORT_COMPLETE_QF_WP = 18,
97         TRANSPORT_COMPLETE_QF_OK = 19,
98 };
99
100 /* Used for struct se_cmd->se_cmd_flags */
101 enum se_cmd_flags_table {
102         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
103         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
104         SCF_EMULATED_TASK_SENSE         = 0x00000004,
105         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
106         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
107         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
108         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
109         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
110         SCF_SE_CMD_FAILED               = 0x00000400,
111         SCF_SE_LUN_CMD                  = 0x00000800,
112         SCF_SE_ALLOW_EOO                = 0x00001000,
113         SCF_SENT_CHECK_CONDITION        = 0x00004000,
114         SCF_OVERFLOW_BIT                = 0x00008000,
115         SCF_UNDERFLOW_BIT               = 0x00010000,
116         SCF_SENT_DELAYED_TAS            = 0x00020000,
117         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
118         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
119         SCF_UNUSED                      = 0x00100000,
120         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
121         SCF_EMULATE_CDB_ASYNC           = 0x01000000,
122 };
123
124 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
125 enum transport_lunflags_table {
126         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
127         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
128         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
129         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
130 };
131
132 /* struct se_device->dev_status */
133 enum transport_device_status_table {
134         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
135         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
136         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
137         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
138         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
139         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
140 };
141
142 /*
143  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
144  * to signal which ASC/ASCQ sense payload should be built.
145  */
146 enum tcm_sense_reason_table {
147         TCM_NON_EXISTENT_LUN                    = 0x01,
148         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
149         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
150         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
151         TCM_SERVICE_CRC_ERROR                   = 0x05,
152         TCM_SNACK_REJECTED                      = 0x06,
153         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
154         TCM_INVALID_CDB_FIELD                   = 0x08,
155         TCM_INVALID_PARAMETER_LIST              = 0x09,
156         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
157         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
158         TCM_WRITE_PROTECTED                     = 0x0c,
159         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
160         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
161         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
162 };
163
164 struct se_obj {
165         atomic_t obj_access_count;
166 } ____cacheline_aligned;
167
168 /*
169  * Used by TCM Core internally to signal if ALUA emulation is enabled or
170  * disabled, or running in with TCM/pSCSI passthrough mode
171  */
172 typedef enum {
173         SPC_ALUA_PASSTHROUGH,
174         SPC2_ALUA_DISABLED,
175         SPC3_ALUA_EMULATED
176 } t10_alua_index_t;
177
178 /*
179  * Used by TCM Core internally to signal if SAM Task Attribute emulation
180  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
181  */
182 typedef enum {
183         SAM_TASK_ATTR_PASSTHROUGH,
184         SAM_TASK_ATTR_UNTAGGED,
185         SAM_TASK_ATTR_EMULATED
186 } t10_task_attr_index_t;
187
188 /*
189  * Used for target SCSI statistics
190  */
191 typedef enum {
192         SCSI_INST_INDEX,
193         SCSI_DEVICE_INDEX,
194         SCSI_AUTH_INTR_INDEX,
195         SCSI_INDEX_TYPE_MAX
196 } scsi_index_t;
197
198 struct se_cmd;
199
200 struct t10_alua {
201         t10_alua_index_t alua_type;
202         /* ALUA Target Port Group ID */
203         u16     alua_tg_pt_gps_counter;
204         u32     alua_tg_pt_gps_count;
205         spinlock_t tg_pt_gps_lock;
206         struct se_subsystem_dev *t10_sub_dev;
207         /* Used for default ALUA Target Port Group */
208         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
209         /* Used for default ALUA Target Port Group ConfigFS group */
210         struct config_group alua_tg_pt_gps_group;
211         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
212         struct list_head tg_pt_gps_list;
213 } ____cacheline_aligned;
214
215 struct t10_alua_lu_gp {
216         u16     lu_gp_id;
217         int     lu_gp_valid_id;
218         u32     lu_gp_members;
219         atomic_t lu_gp_shutdown;
220         atomic_t lu_gp_ref_cnt;
221         spinlock_t lu_gp_lock;
222         struct config_group lu_gp_group;
223         struct list_head lu_gp_node;
224         struct list_head lu_gp_mem_list;
225 } ____cacheline_aligned;
226
227 struct t10_alua_lu_gp_member {
228         bool lu_gp_assoc;
229         atomic_t lu_gp_mem_ref_cnt;
230         spinlock_t lu_gp_mem_lock;
231         struct t10_alua_lu_gp *lu_gp;
232         struct se_device *lu_gp_mem_dev;
233         struct list_head lu_gp_mem_list;
234 } ____cacheline_aligned;
235
236 struct t10_alua_tg_pt_gp {
237         u16     tg_pt_gp_id;
238         int     tg_pt_gp_valid_id;
239         int     tg_pt_gp_alua_access_status;
240         int     tg_pt_gp_alua_access_type;
241         int     tg_pt_gp_nonop_delay_msecs;
242         int     tg_pt_gp_trans_delay_msecs;
243         int     tg_pt_gp_pref;
244         int     tg_pt_gp_write_metadata;
245         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
246 #define ALUA_MD_BUF_LEN                         1024
247         u32     tg_pt_gp_md_buf_len;
248         u32     tg_pt_gp_members;
249         atomic_t tg_pt_gp_alua_access_state;
250         atomic_t tg_pt_gp_ref_cnt;
251         spinlock_t tg_pt_gp_lock;
252         struct mutex tg_pt_gp_md_mutex;
253         struct se_subsystem_dev *tg_pt_gp_su_dev;
254         struct config_group tg_pt_gp_group;
255         struct list_head tg_pt_gp_list;
256         struct list_head tg_pt_gp_mem_list;
257 } ____cacheline_aligned;
258
259 struct t10_alua_tg_pt_gp_member {
260         bool tg_pt_gp_assoc;
261         atomic_t tg_pt_gp_mem_ref_cnt;
262         spinlock_t tg_pt_gp_mem_lock;
263         struct t10_alua_tg_pt_gp *tg_pt_gp;
264         struct se_port *tg_pt;
265         struct list_head tg_pt_gp_mem_list;
266 } ____cacheline_aligned;
267
268 struct t10_vpd {
269         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
270         int protocol_identifier_set;
271         u32 protocol_identifier;
272         u32 device_identifier_code_set;
273         u32 association;
274         u32 device_identifier_type;
275         struct list_head vpd_list;
276 } ____cacheline_aligned;
277
278 struct t10_wwn {
279         char vendor[8];
280         char model[16];
281         char revision[4];
282         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
283         spinlock_t t10_vpd_lock;
284         struct se_subsystem_dev *t10_sub_dev;
285         struct config_group t10_wwn_group;
286         struct list_head t10_vpd_list;
287 } ____cacheline_aligned;
288
289
290 /*
291  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
292  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
293  * mode
294  */
295 typedef enum {
296         SPC_PASSTHROUGH,
297         SPC2_RESERVATIONS,
298         SPC3_PERSISTENT_RESERVATIONS
299 } t10_reservations_index_t;
300
301 struct t10_pr_registration {
302         /* Used for fabrics that contain WWN+ISID */
303 #define PR_REG_ISID_LEN                         16
304         /* PR_REG_ISID_LEN + ',i,0x' */
305 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
306         char pr_reg_isid[PR_REG_ISID_LEN];
307         /* Used during APTPL metadata reading */
308 #define PR_APTPL_MAX_IPORT_LEN                  256
309         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
310         /* Used during APTPL metadata reading */
311 #define PR_APTPL_MAX_TPORT_LEN                  256
312         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
313         /* For writing out live meta data */
314         unsigned char *pr_aptpl_buf;
315         u16 pr_aptpl_rpti;
316         u16 pr_reg_tpgt;
317         /* Reservation effects all target ports */
318         int pr_reg_all_tg_pt;
319         /* Activate Persistence across Target Power Loss */
320         int pr_reg_aptpl;
321         int pr_res_holder;
322         int pr_res_type;
323         int pr_res_scope;
324         /* Used for fabric initiator WWPNs using a ISID */
325         bool isid_present_at_reg;
326         u32 pr_res_mapped_lun;
327         u32 pr_aptpl_target_lun;
328         u32 pr_res_generation;
329         u64 pr_reg_bin_isid;
330         u64 pr_res_key;
331         atomic_t pr_res_holders;
332         struct se_node_acl *pr_reg_nacl;
333         struct se_dev_entry *pr_reg_deve;
334         struct se_lun *pr_reg_tg_pt_lun;
335         struct list_head pr_reg_list;
336         struct list_head pr_reg_abort_list;
337         struct list_head pr_reg_aptpl_list;
338         struct list_head pr_reg_atp_list;
339         struct list_head pr_reg_atp_mem_list;
340 } ____cacheline_aligned;
341
342 /*
343  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
344  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
345  * core_setup_reservations()
346  */
347 struct t10_reservation_ops {
348         int (*t10_reservation_check)(struct se_cmd *, u32 *);
349         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
350         int (*t10_pr_register)(struct se_cmd *);
351         int (*t10_pr_clear)(struct se_cmd *);
352 };
353
354 struct t10_reservation {
355         /* Reservation effects all target ports */
356         int pr_all_tg_pt;
357         /* Activate Persistence across Target Power Loss enabled
358          * for SCSI device */
359         int pr_aptpl_active;
360         /* Used by struct t10_reservation->pr_aptpl_buf_len */
361 #define PR_APTPL_BUF_LEN                        8192
362         u32 pr_aptpl_buf_len;
363         u32 pr_generation;
364         t10_reservations_index_t res_type;
365         spinlock_t registration_lock;
366         spinlock_t aptpl_reg_lock;
367         /*
368          * This will always be set by one individual I_T Nexus.
369          * However with all_tg_pt=1, other I_T Nexus from the
370          * same initiator can access PR reg/res info on a different
371          * target port.
372          *
373          * There is also the 'All Registrants' case, where there is
374          * a single *pr_res_holder of the reservation, but all
375          * registrations are considered reservation holders.
376          */
377         struct se_node_acl *pr_res_holder;
378         struct list_head registration_list;
379         struct list_head aptpl_reg_list;
380         struct t10_reservation_ops pr_ops;
381 } ____cacheline_aligned;
382
383 struct se_queue_req {
384         int                     state;
385         struct se_cmd           *cmd;
386         struct list_head        qr_list;
387 } ____cacheline_aligned;
388
389 struct se_queue_obj {
390         atomic_t                queue_cnt;
391         spinlock_t              cmd_queue_lock;
392         struct list_head        qobj_list;
393         wait_queue_head_t       thread_wq;
394 } ____cacheline_aligned;
395
396 struct se_task {
397         unsigned long long      task_lba;
398         u32                     task_sectors;
399         u32                     task_size;
400         struct se_cmd           *task_se_cmd;
401         struct scatterlist      *task_sg;
402         struct scatterlist      *task_sg_bidi;
403         u32                     task_sg_nents;
404         u16                     task_flags;
405         u8                      task_sense;
406         u8                      task_scsi_status;
407         int                     task_error_status;
408         enum dma_data_direction task_data_direction;
409         atomic_t                task_state_active;
410         struct timer_list       task_timer;
411         struct list_head        t_list;
412         struct list_head        t_execute_list;
413         struct list_head        t_state_list;
414         struct completion       task_stop_comp;
415 } ____cacheline_aligned;
416
417 struct se_cmd {
418         /* SAM response code being sent to initiator */
419         u8                      scsi_status;
420         u8                      scsi_asc;
421         u8                      scsi_ascq;
422         u8                      scsi_sense_reason;
423         u16                     scsi_sense_length;
424         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
425         int                     alua_nonop_delay;
426         /* See include/linux/dma-mapping.h */
427         enum dma_data_direction data_direction;
428         /* For SAM Task Attribute */
429         int                     sam_task_attr;
430         /* Transport protocol dependent state, see transport_state_table */
431         enum transport_state_table t_state;
432         /* Transport specific error status */
433         int                     transport_error_status;
434         /* See se_cmd_flags_table */
435         u32                     se_cmd_flags;
436         u32                     se_ordered_id;
437         /* Total size in bytes associated with command */
438         u32                     data_length;
439         /* SCSI Presented Data Transfer Length */
440         u32                     cmd_spdtl;
441         u32                     residual_count;
442         u32                     orig_fe_lun;
443         /* Persistent Reservation key */
444         u64                     pr_res_key;
445         atomic_t                transport_sent;
446         /* Used for sense data */
447         void                    *sense_buffer;
448         struct list_head        se_delayed_node;
449         struct list_head        se_ordered_node;
450         struct list_head        se_lun_node;
451         struct list_head        se_qf_node;
452         struct se_device      *se_dev;
453         struct se_dev_entry   *se_deve;
454         struct se_device        *se_obj_ptr;
455         struct se_device        *se_orig_obj_ptr;
456         struct se_lun           *se_lun;
457         /* Only used for internal passthrough and legacy TCM fabric modules */
458         struct se_session       *se_sess;
459         struct se_tmr_req       *se_tmr_req;
460         struct list_head        se_queue_node;
461         struct target_core_fabric_ops *se_tfo;
462         int (*transport_emulate_cdb)(struct se_cmd *);
463         void (*transport_complete_callback)(struct se_cmd *);
464
465         unsigned char           *t_task_cdb;
466         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
467         unsigned long long      t_task_lba;
468         int                     t_tasks_failed;
469         int                     t_tasks_fua;
470         bool                    t_tasks_bidi;
471         u32                     t_tasks_sg_chained_no;
472         atomic_t                t_fe_count;
473         atomic_t                t_se_count;
474         atomic_t                t_task_cdbs_left;
475         atomic_t                t_task_cdbs_ex_left;
476         atomic_t                t_task_cdbs_timeout_left;
477         atomic_t                t_task_cdbs_sent;
478         atomic_t                t_transport_aborted;
479         atomic_t                t_transport_active;
480         atomic_t                t_transport_complete;
481         atomic_t                t_transport_queue_active;
482         atomic_t                t_transport_sent;
483         atomic_t                t_transport_stop;
484         atomic_t                t_transport_timeout;
485         atomic_t                transport_dev_active;
486         atomic_t                transport_lun_active;
487         atomic_t                transport_lun_fe_stop;
488         atomic_t                transport_lun_stop;
489         spinlock_t              t_state_lock;
490         struct completion       t_transport_stop_comp;
491         struct completion       transport_lun_fe_stop_comp;
492         struct completion       transport_lun_stop_comp;
493         struct scatterlist      *t_tasks_sg_chained;
494
495         /*
496          * Used for pre-registered fabric SGL passthrough WRITE and READ
497          * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
498          * and other HW target mode fabric modules.
499          */
500         struct scatterlist      *t_task_pt_sgl;
501         u32                     t_task_pt_sgl_num;
502
503         struct scatterlist      *t_data_sg;
504         unsigned int            t_data_nents;
505         struct scatterlist      *t_bidi_data_sg;
506         unsigned int            t_bidi_data_nents;
507
508         /* Used for BIDI READ */
509         struct list_head        t_task_list;
510         u32                     t_task_list_num;
511
512 } ____cacheline_aligned;
513
514 struct se_tmr_req {
515         /* Task Management function to be preformed */
516         u8                      function;
517         /* Task Management response to send */
518         u8                      response;
519         int                     call_transport;
520         /* Reference to ITT that Task Mgmt should be preformed */
521         u32                     ref_task_tag;
522         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
523         u64                     ref_task_lun;
524         void                    *fabric_tmr_ptr;
525         struct se_cmd           *task_cmd;
526         struct se_cmd           *ref_cmd;
527         struct se_device        *tmr_dev;
528         struct se_lun           *tmr_lun;
529         struct list_head        tmr_list;
530 } ____cacheline_aligned;
531
532 struct se_ua {
533         u8                      ua_asc;
534         u8                      ua_ascq;
535         struct se_node_acl      *ua_nacl;
536         struct list_head        ua_dev_list;
537         struct list_head        ua_nacl_list;
538 } ____cacheline_aligned;
539
540 struct se_node_acl {
541         char                    initiatorname[TRANSPORT_IQN_LEN];
542         /* Used to signal demo mode created ACL, disabled by default */
543         bool                    dynamic_node_acl;
544         u32                     queue_depth;
545         u32                     acl_index;
546         u64                     num_cmds;
547         u64                     read_bytes;
548         u64                     write_bytes;
549         spinlock_t              stats_lock;
550         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
551         atomic_t                acl_pr_ref_count;
552         struct se_dev_entry     *device_list;
553         struct se_session       *nacl_sess;
554         struct se_portal_group *se_tpg;
555         spinlock_t              device_list_lock;
556         spinlock_t              nacl_sess_lock;
557         struct config_group     acl_group;
558         struct config_group     acl_attrib_group;
559         struct config_group     acl_auth_group;
560         struct config_group     acl_param_group;
561         struct config_group     acl_fabric_stat_group;
562         struct config_group     *acl_default_groups[5];
563         struct list_head        acl_list;
564         struct list_head        acl_sess_list;
565 } ____cacheline_aligned;
566
567 struct se_session {
568         u64                     sess_bin_isid;
569         struct se_node_acl      *se_node_acl;
570         struct se_portal_group *se_tpg;
571         void                    *fabric_sess_ptr;
572         struct list_head        sess_list;
573         struct list_head        sess_acl_list;
574 } ____cacheline_aligned;
575
576 struct se_device;
577 struct se_transform_info;
578 struct scatterlist;
579
580 struct se_ml_stat_grps {
581         struct config_group     stat_group;
582         struct config_group     scsi_auth_intr_group;
583         struct config_group     scsi_att_intr_port_group;
584 };
585
586 struct se_lun_acl {
587         char                    initiatorname[TRANSPORT_IQN_LEN];
588         u32                     mapped_lun;
589         struct se_node_acl      *se_lun_nacl;
590         struct se_lun           *se_lun;
591         struct list_head        lacl_list;
592         struct config_group     se_lun_group;
593         struct se_ml_stat_grps  ml_stat_grps;
594 }  ____cacheline_aligned;
595
596 struct se_dev_entry {
597         bool                    def_pr_registered;
598         /* See transport_lunflags_table */
599         u32                     lun_flags;
600         u32                     deve_cmds;
601         u32                     mapped_lun;
602         u32                     average_bytes;
603         u32                     last_byte_count;
604         u32                     total_cmds;
605         u32                     total_bytes;
606         u64                     pr_res_key;
607         u64                     creation_time;
608         u32                     attach_count;
609         u64                     read_bytes;
610         u64                     write_bytes;
611         atomic_t                ua_count;
612         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
613         atomic_t                pr_ref_count;
614         struct se_lun_acl       *se_lun_acl;
615         spinlock_t              ua_lock;
616         struct se_lun           *se_lun;
617         struct list_head        alua_port_list;
618         struct list_head        ua_list;
619 }  ____cacheline_aligned;
620
621 struct se_dev_limits {
622         /* Max supported HW queue depth */
623         u32             hw_queue_depth;
624         /* Max supported virtual queue depth */
625         u32             queue_depth;
626         /* From include/linux/blkdev.h for the other HW/SW limits. */
627         struct queue_limits limits;
628 } ____cacheline_aligned;
629
630 struct se_dev_attrib {
631         int             emulate_dpo;
632         int             emulate_fua_write;
633         int             emulate_fua_read;
634         int             emulate_write_cache;
635         int             emulate_ua_intlck_ctrl;
636         int             emulate_tas;
637         int             emulate_tpu;
638         int             emulate_tpws;
639         int             emulate_reservations;
640         int             emulate_alua;
641         int             enforce_pr_isids;
642         int             is_nonrot;
643         int             emulate_rest_reord;
644         u32             hw_block_size;
645         u32             block_size;
646         u32             hw_max_sectors;
647         u32             max_sectors;
648         u32             optimal_sectors;
649         u32             hw_queue_depth;
650         u32             queue_depth;
651         u32             task_timeout;
652         u32             max_unmap_lba_count;
653         u32             max_unmap_block_desc_count;
654         u32             unmap_granularity;
655         u32             unmap_granularity_alignment;
656         struct se_subsystem_dev *da_sub_dev;
657         struct config_group da_group;
658 } ____cacheline_aligned;
659
660 struct se_dev_stat_grps {
661         struct config_group stat_group;
662         struct config_group scsi_dev_group;
663         struct config_group scsi_tgt_dev_group;
664         struct config_group scsi_lu_group;
665 };
666
667 struct se_subsystem_dev {
668 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
669 #define SE_DEV_ALIAS_LEN                512
670         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
671 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
672 #define SE_UDEV_PATH_LEN                512
673         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
674         u32             su_dev_flags;
675         struct se_hba *se_dev_hba;
676         struct se_device *se_dev_ptr;
677         struct se_dev_attrib se_dev_attrib;
678         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
679         struct t10_alua t10_alua;
680         /* T10 Inquiry and VPD WWN Information */
681         struct t10_wwn  t10_wwn;
682         /* T10 SPC-2 + SPC-3 Reservations */
683         struct t10_reservation t10_pr;
684         spinlock_t      se_dev_lock;
685         void            *se_dev_su_ptr;
686         struct list_head se_dev_node;
687         struct config_group se_dev_group;
688         /* For T10 Reservations */
689         struct config_group se_dev_pr_group;
690         /* For target_core_stat.c groups */
691         struct se_dev_stat_grps dev_stat_grps;
692 } ____cacheline_aligned;
693
694 struct se_device {
695         /* Set to 1 if thread is NOT sleeping on thread_sem */
696         u8                      thread_active;
697         u8                      dev_status_timer_flags;
698         /* RELATIVE TARGET PORT IDENTIFER Counter */
699         u16                     dev_rpti_counter;
700         /* Used for SAM Task Attribute ordering */
701         u32                     dev_cur_ordered_id;
702         u32                     dev_flags;
703         u32                     dev_port_count;
704         /* See transport_device_status_table */
705         u32                     dev_status;
706         u32                     dev_tcq_window_closed;
707         /* Physical device queue depth */
708         u32                     queue_depth;
709         /* Used for SPC-2 reservations enforce of ISIDs */
710         u64                     dev_res_bin_isid;
711         t10_task_attr_index_t   dev_task_attr_type;
712         /* Pointer to transport specific device structure */
713         void                    *dev_ptr;
714         u32                     dev_index;
715         u64                     creation_time;
716         u32                     num_resets;
717         u64                     num_cmds;
718         u64                     read_bytes;
719         u64                     write_bytes;
720         spinlock_t              stats_lock;
721         /* Active commands on this virtual SE device */
722         atomic_t                active_cmds;
723         atomic_t                simple_cmds;
724         atomic_t                depth_left;
725         atomic_t                dev_ordered_id;
726         atomic_t                dev_tur_active;
727         atomic_t                execute_tasks;
728         atomic_t                dev_status_thr_count;
729         atomic_t                dev_hoq_count;
730         atomic_t                dev_ordered_sync;
731         atomic_t                dev_qf_count;
732         struct se_obj           dev_obj;
733         struct se_obj           dev_access_obj;
734         struct se_obj           dev_export_obj;
735         struct se_queue_obj     dev_queue_obj;
736         spinlock_t              delayed_cmd_lock;
737         spinlock_t              ordered_cmd_lock;
738         spinlock_t              execute_task_lock;
739         spinlock_t              state_task_lock;
740         spinlock_t              dev_alua_lock;
741         spinlock_t              dev_reservation_lock;
742         spinlock_t              dev_state_lock;
743         spinlock_t              dev_status_lock;
744         spinlock_t              dev_status_thr_lock;
745         spinlock_t              se_port_lock;
746         spinlock_t              se_tmr_lock;
747         spinlock_t              qf_cmd_lock;
748         /* Used for legacy SPC-2 reservationsa */
749         struct se_node_acl      *dev_reserved_node_acl;
750         /* Used for ALUA Logical Unit Group membership */
751         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
752         /* Used for SPC-3 Persistent Reservations */
753         struct t10_pr_registration *dev_pr_res_holder;
754         struct list_head        dev_sep_list;
755         struct list_head        dev_tmr_list;
756         struct timer_list       dev_status_timer;
757         /* Pointer to descriptor for processing thread */
758         struct task_struct      *process_thread;
759         pid_t                   process_thread_pid;
760         struct task_struct              *dev_mgmt_thread;
761         struct work_struct      qf_work_queue;
762         struct list_head        delayed_cmd_list;
763         struct list_head        ordered_cmd_list;
764         struct list_head        execute_task_list;
765         struct list_head        state_task_list;
766         struct list_head        qf_cmd_list;
767         /* Pointer to associated SE HBA */
768         struct se_hba           *se_hba;
769         struct se_subsystem_dev *se_sub_dev;
770         /* Pointer to template of function pointers for transport */
771         struct se_subsystem_api *transport;
772         /* Linked list for struct se_hba struct se_device list */
773         struct list_head        dev_list;
774         /* Linked list for struct se_global->g_se_dev_list */
775         struct list_head        g_se_dev_list;
776 }  ____cacheline_aligned;
777
778 struct se_hba {
779         u16                     hba_tpgt;
780         u32                     hba_id;
781         /* See hba_flags_table */
782         u32                     hba_flags;
783         /* Virtual iSCSI devices attached. */
784         u32                     dev_count;
785         u32                     hba_index;
786         /* Pointer to transport specific host structure. */
787         void                    *hba_ptr;
788         /* Linked list for struct se_device */
789         struct list_head        hba_dev_list;
790         struct list_head        hba_node;
791         spinlock_t              device_lock;
792         struct config_group     hba_group;
793         struct mutex            hba_access_mutex;
794         struct se_subsystem_api *transport;
795 }  ____cacheline_aligned;
796
797 struct se_port_stat_grps {
798         struct config_group stat_group;
799         struct config_group scsi_port_group;
800         struct config_group scsi_tgt_port_group;
801         struct config_group scsi_transport_group;
802 };
803
804 struct se_lun {
805         /* See transport_lun_status_table */
806         enum transport_lun_status_table lun_status;
807         u32                     lun_access;
808         u32                     lun_flags;
809         u32                     unpacked_lun;
810         atomic_t                lun_acl_count;
811         spinlock_t              lun_acl_lock;
812         spinlock_t              lun_cmd_lock;
813         spinlock_t              lun_sep_lock;
814         struct completion       lun_shutdown_comp;
815         struct list_head        lun_cmd_list;
816         struct list_head        lun_acl_list;
817         struct se_device        *lun_se_dev;
818         struct se_port          *lun_sep;
819         struct config_group     lun_group;
820         struct se_port_stat_grps port_stat_grps;
821 } ____cacheline_aligned;
822
823 struct scsi_port_stats {
824        u64     cmd_pdus;
825        u64     tx_data_octets;
826        u64     rx_data_octets;
827 } ____cacheline_aligned;
828
829 struct se_port {
830         /* RELATIVE TARGET PORT IDENTIFER */
831         u16             sep_rtpi;
832         int             sep_tg_pt_secondary_stat;
833         int             sep_tg_pt_secondary_write_md;
834         u32             sep_index;
835         struct scsi_port_stats sep_stats;
836         /* Used for ALUA Target Port Groups membership */
837         atomic_t        sep_tg_pt_gp_active;
838         atomic_t        sep_tg_pt_secondary_offline;
839         /* Used for PR ALL_TG_PT=1 */
840         atomic_t        sep_tg_pt_ref_cnt;
841         spinlock_t      sep_alua_lock;
842         struct mutex    sep_tg_pt_md_mutex;
843         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
844         struct se_lun *sep_lun;
845         struct se_portal_group *sep_tpg;
846         struct list_head sep_alua_list;
847         struct list_head sep_list;
848 } ____cacheline_aligned;
849
850 struct se_tpg_np {
851         struct se_portal_group *tpg_np_parent;
852         struct config_group     tpg_np_group;
853 } ____cacheline_aligned;
854
855 struct se_portal_group {
856         /* Type of target portal group, see transport_tpg_type_table */
857         enum transport_tpg_type_table se_tpg_type;
858         /* Number of ACLed Initiator Nodes for this TPG */
859         u32                     num_node_acls;
860         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
861         atomic_t                tpg_pr_ref_count;
862         /* Spinlock for adding/removing ACLed Nodes */
863         spinlock_t              acl_node_lock;
864         /* Spinlock for adding/removing sessions */
865         spinlock_t              session_lock;
866         spinlock_t              tpg_lun_lock;
867         /* Pointer to $FABRIC_MOD portal group */
868         void                    *se_tpg_fabric_ptr;
869         struct list_head        se_tpg_node;
870         /* linked list for initiator ACL list */
871         struct list_head        acl_node_list;
872         struct se_lun           *tpg_lun_list;
873         struct se_lun           tpg_virt_lun0;
874         /* List of TCM sessions associated wth this TPG */
875         struct list_head        tpg_sess_list;
876         /* Pointer to $FABRIC_MOD dependent code */
877         struct target_core_fabric_ops *se_tpg_tfo;
878         struct se_wwn           *se_tpg_wwn;
879         struct config_group     tpg_group;
880         struct config_group     *tpg_default_groups[6];
881         struct config_group     tpg_lun_group;
882         struct config_group     tpg_np_group;
883         struct config_group     tpg_acl_group;
884         struct config_group     tpg_attrib_group;
885         struct config_group     tpg_param_group;
886 } ____cacheline_aligned;
887
888 struct se_wwn {
889         struct target_fabric_configfs *wwn_tf;
890         struct config_group     wwn_group;
891         struct config_group     *wwn_default_groups[2];
892         struct config_group     fabric_stat_group;
893 } ____cacheline_aligned;
894
895 #endif /* TARGET_CORE_BASE_H */