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Merge branch 'for_3.2/pm-cleanup-2' of git://github.com/khilman/linux-omap-pm into...
[karo-tx-linux.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_REQUEST_STOP         = (1 << 2),
79 };
80
81 /* Special transport agnostic struct se_cmd->t_states */
82 enum transport_state_table {
83         TRANSPORT_NO_STATE      = 0,
84         TRANSPORT_NEW_CMD       = 1,
85         TRANSPORT_WRITE_PENDING = 3,
86         TRANSPORT_PROCESS_WRITE = 4,
87         TRANSPORT_PROCESSING    = 5,
88         TRANSPORT_COMPLETE      = 6,
89         TRANSPORT_PROCESS_TMR   = 9,
90         TRANSPORT_ISTATE_PROCESSING = 11,
91         TRANSPORT_NEW_CMD_MAP   = 16,
92         TRANSPORT_FREE_CMD_INTR = 17,
93         TRANSPORT_COMPLETE_QF_WP = 18,
94         TRANSPORT_COMPLETE_QF_OK = 19,
95 };
96
97 /* Used for struct se_cmd->se_cmd_flags */
98 enum se_cmd_flags_table {
99         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
100         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
101         SCF_EMULATED_TASK_SENSE         = 0x00000004,
102         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
103         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
104         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
105         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
106         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
107         SCF_SE_CMD_FAILED               = 0x00000400,
108         SCF_SE_LUN_CMD                  = 0x00000800,
109         SCF_SE_ALLOW_EOO                = 0x00001000,
110         SCF_SENT_CHECK_CONDITION        = 0x00004000,
111         SCF_OVERFLOW_BIT                = 0x00008000,
112         SCF_UNDERFLOW_BIT               = 0x00010000,
113         SCF_SENT_DELAYED_TAS            = 0x00020000,
114         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
115         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
116         SCF_UNUSED                      = 0x00100000,
117         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
118         SCF_EMULATE_CDB_ASYNC           = 0x01000000,
119 };
120
121 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
122 enum transport_lunflags_table {
123         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
124         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
125         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
126         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
127 };
128
129 /* struct se_device->dev_status */
130 enum transport_device_status_table {
131         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
132         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
133         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
134         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
135         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
136         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
137 };
138
139 /*
140  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
141  * to signal which ASC/ASCQ sense payload should be built.
142  */
143 enum tcm_sense_reason_table {
144         TCM_NON_EXISTENT_LUN                    = 0x01,
145         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
146         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
147         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
148         TCM_SERVICE_CRC_ERROR                   = 0x05,
149         TCM_SNACK_REJECTED                      = 0x06,
150         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
151         TCM_INVALID_CDB_FIELD                   = 0x08,
152         TCM_INVALID_PARAMETER_LIST              = 0x09,
153         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
154         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
155         TCM_WRITE_PROTECTED                     = 0x0c,
156         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
157         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
158         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
159 };
160
161 struct se_obj {
162         atomic_t obj_access_count;
163 } ____cacheline_aligned;
164
165 /*
166  * Used by TCM Core internally to signal if ALUA emulation is enabled or
167  * disabled, or running in with TCM/pSCSI passthrough mode
168  */
169 typedef enum {
170         SPC_ALUA_PASSTHROUGH,
171         SPC2_ALUA_DISABLED,
172         SPC3_ALUA_EMULATED
173 } t10_alua_index_t;
174
175 /*
176  * Used by TCM Core internally to signal if SAM Task Attribute emulation
177  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
178  */
179 typedef enum {
180         SAM_TASK_ATTR_PASSTHROUGH,
181         SAM_TASK_ATTR_UNTAGGED,
182         SAM_TASK_ATTR_EMULATED
183 } t10_task_attr_index_t;
184
185 /*
186  * Used for target SCSI statistics
187  */
188 typedef enum {
189         SCSI_INST_INDEX,
190         SCSI_DEVICE_INDEX,
191         SCSI_AUTH_INTR_INDEX,
192         SCSI_INDEX_TYPE_MAX
193 } scsi_index_t;
194
195 struct se_cmd;
196
197 struct t10_alua {
198         t10_alua_index_t alua_type;
199         /* ALUA Target Port Group ID */
200         u16     alua_tg_pt_gps_counter;
201         u32     alua_tg_pt_gps_count;
202         spinlock_t tg_pt_gps_lock;
203         struct se_subsystem_dev *t10_sub_dev;
204         /* Used for default ALUA Target Port Group */
205         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
206         /* Used for default ALUA Target Port Group ConfigFS group */
207         struct config_group alua_tg_pt_gps_group;
208         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
209         struct list_head tg_pt_gps_list;
210 } ____cacheline_aligned;
211
212 struct t10_alua_lu_gp {
213         u16     lu_gp_id;
214         int     lu_gp_valid_id;
215         u32     lu_gp_members;
216         atomic_t lu_gp_shutdown;
217         atomic_t lu_gp_ref_cnt;
218         spinlock_t lu_gp_lock;
219         struct config_group lu_gp_group;
220         struct list_head lu_gp_node;
221         struct list_head lu_gp_mem_list;
222 } ____cacheline_aligned;
223
224 struct t10_alua_lu_gp_member {
225         bool lu_gp_assoc;
226         atomic_t lu_gp_mem_ref_cnt;
227         spinlock_t lu_gp_mem_lock;
228         struct t10_alua_lu_gp *lu_gp;
229         struct se_device *lu_gp_mem_dev;
230         struct list_head lu_gp_mem_list;
231 } ____cacheline_aligned;
232
233 struct t10_alua_tg_pt_gp {
234         u16     tg_pt_gp_id;
235         int     tg_pt_gp_valid_id;
236         int     tg_pt_gp_alua_access_status;
237         int     tg_pt_gp_alua_access_type;
238         int     tg_pt_gp_nonop_delay_msecs;
239         int     tg_pt_gp_trans_delay_msecs;
240         int     tg_pt_gp_pref;
241         int     tg_pt_gp_write_metadata;
242         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
243 #define ALUA_MD_BUF_LEN                         1024
244         u32     tg_pt_gp_md_buf_len;
245         u32     tg_pt_gp_members;
246         atomic_t tg_pt_gp_alua_access_state;
247         atomic_t tg_pt_gp_ref_cnt;
248         spinlock_t tg_pt_gp_lock;
249         struct mutex tg_pt_gp_md_mutex;
250         struct se_subsystem_dev *tg_pt_gp_su_dev;
251         struct config_group tg_pt_gp_group;
252         struct list_head tg_pt_gp_list;
253         struct list_head tg_pt_gp_mem_list;
254 } ____cacheline_aligned;
255
256 struct t10_alua_tg_pt_gp_member {
257         bool tg_pt_gp_assoc;
258         atomic_t tg_pt_gp_mem_ref_cnt;
259         spinlock_t tg_pt_gp_mem_lock;
260         struct t10_alua_tg_pt_gp *tg_pt_gp;
261         struct se_port *tg_pt;
262         struct list_head tg_pt_gp_mem_list;
263 } ____cacheline_aligned;
264
265 struct t10_vpd {
266         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
267         int protocol_identifier_set;
268         u32 protocol_identifier;
269         u32 device_identifier_code_set;
270         u32 association;
271         u32 device_identifier_type;
272         struct list_head vpd_list;
273 } ____cacheline_aligned;
274
275 struct t10_wwn {
276         char vendor[8];
277         char model[16];
278         char revision[4];
279         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
280         spinlock_t t10_vpd_lock;
281         struct se_subsystem_dev *t10_sub_dev;
282         struct config_group t10_wwn_group;
283         struct list_head t10_vpd_list;
284 } ____cacheline_aligned;
285
286
287 /*
288  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
289  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
290  * mode
291  */
292 typedef enum {
293         SPC_PASSTHROUGH,
294         SPC2_RESERVATIONS,
295         SPC3_PERSISTENT_RESERVATIONS
296 } t10_reservations_index_t;
297
298 struct t10_pr_registration {
299         /* Used for fabrics that contain WWN+ISID */
300 #define PR_REG_ISID_LEN                         16
301         /* PR_REG_ISID_LEN + ',i,0x' */
302 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
303         char pr_reg_isid[PR_REG_ISID_LEN];
304         /* Used during APTPL metadata reading */
305 #define PR_APTPL_MAX_IPORT_LEN                  256
306         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
307         /* Used during APTPL metadata reading */
308 #define PR_APTPL_MAX_TPORT_LEN                  256
309         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
310         /* For writing out live meta data */
311         unsigned char *pr_aptpl_buf;
312         u16 pr_aptpl_rpti;
313         u16 pr_reg_tpgt;
314         /* Reservation effects all target ports */
315         int pr_reg_all_tg_pt;
316         /* Activate Persistence across Target Power Loss */
317         int pr_reg_aptpl;
318         int pr_res_holder;
319         int pr_res_type;
320         int pr_res_scope;
321         /* Used for fabric initiator WWPNs using a ISID */
322         bool isid_present_at_reg;
323         u32 pr_res_mapped_lun;
324         u32 pr_aptpl_target_lun;
325         u32 pr_res_generation;
326         u64 pr_reg_bin_isid;
327         u64 pr_res_key;
328         atomic_t pr_res_holders;
329         struct se_node_acl *pr_reg_nacl;
330         struct se_dev_entry *pr_reg_deve;
331         struct se_lun *pr_reg_tg_pt_lun;
332         struct list_head pr_reg_list;
333         struct list_head pr_reg_abort_list;
334         struct list_head pr_reg_aptpl_list;
335         struct list_head pr_reg_atp_list;
336         struct list_head pr_reg_atp_mem_list;
337 } ____cacheline_aligned;
338
339 /*
340  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
341  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
342  * core_setup_reservations()
343  */
344 struct t10_reservation_ops {
345         int (*t10_reservation_check)(struct se_cmd *, u32 *);
346         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
347         int (*t10_pr_register)(struct se_cmd *);
348         int (*t10_pr_clear)(struct se_cmd *);
349 };
350
351 struct t10_reservation {
352         /* Reservation effects all target ports */
353         int pr_all_tg_pt;
354         /* Activate Persistence across Target Power Loss enabled
355          * for SCSI device */
356         int pr_aptpl_active;
357         /* Used by struct t10_reservation->pr_aptpl_buf_len */
358 #define PR_APTPL_BUF_LEN                        8192
359         u32 pr_aptpl_buf_len;
360         u32 pr_generation;
361         t10_reservations_index_t res_type;
362         spinlock_t registration_lock;
363         spinlock_t aptpl_reg_lock;
364         /*
365          * This will always be set by one individual I_T Nexus.
366          * However with all_tg_pt=1, other I_T Nexus from the
367          * same initiator can access PR reg/res info on a different
368          * target port.
369          *
370          * There is also the 'All Registrants' case, where there is
371          * a single *pr_res_holder of the reservation, but all
372          * registrations are considered reservation holders.
373          */
374         struct se_node_acl *pr_res_holder;
375         struct list_head registration_list;
376         struct list_head aptpl_reg_list;
377         struct t10_reservation_ops pr_ops;
378 } ____cacheline_aligned;
379
380 struct se_queue_req {
381         int                     state;
382         struct se_cmd           *cmd;
383         struct list_head        qr_list;
384 } ____cacheline_aligned;
385
386 struct se_queue_obj {
387         atomic_t                queue_cnt;
388         spinlock_t              cmd_queue_lock;
389         struct list_head        qobj_list;
390         wait_queue_head_t       thread_wq;
391 } ____cacheline_aligned;
392
393 struct se_task {
394         unsigned long long      task_lba;
395         u32                     task_sectors;
396         u32                     task_size;
397         struct se_cmd           *task_se_cmd;
398         struct scatterlist      *task_sg;
399         u32                     task_sg_nents;
400         u16                     task_flags;
401         u8                      task_sense;
402         u8                      task_scsi_status;
403         int                     task_error_status;
404         enum dma_data_direction task_data_direction;
405         atomic_t                task_state_active;
406         struct list_head        t_list;
407         struct list_head        t_execute_list;
408         struct list_head        t_state_list;
409         struct completion       task_stop_comp;
410 } ____cacheline_aligned;
411
412 struct se_cmd {
413         /* SAM response code being sent to initiator */
414         u8                      scsi_status;
415         u8                      scsi_asc;
416         u8                      scsi_ascq;
417         u8                      scsi_sense_reason;
418         u16                     scsi_sense_length;
419         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
420         int                     alua_nonop_delay;
421         /* See include/linux/dma-mapping.h */
422         enum dma_data_direction data_direction;
423         /* For SAM Task Attribute */
424         int                     sam_task_attr;
425         /* Transport protocol dependent state, see transport_state_table */
426         enum transport_state_table t_state;
427         /* Transport specific error status */
428         int                     transport_error_status;
429         /* See se_cmd_flags_table */
430         u32                     se_cmd_flags;
431         u32                     se_ordered_id;
432         /* Total size in bytes associated with command */
433         u32                     data_length;
434         /* SCSI Presented Data Transfer Length */
435         u32                     cmd_spdtl;
436         u32                     residual_count;
437         u32                     orig_fe_lun;
438         /* Persistent Reservation key */
439         u64                     pr_res_key;
440         /* Used for sense data */
441         void                    *sense_buffer;
442         struct list_head        se_delayed_node;
443         struct list_head        se_ordered_node;
444         struct list_head        se_lun_node;
445         struct list_head        se_qf_node;
446         struct se_device      *se_dev;
447         struct se_dev_entry   *se_deve;
448         struct se_device        *se_obj_ptr;
449         struct se_device        *se_orig_obj_ptr;
450         struct se_lun           *se_lun;
451         /* Only used for internal passthrough and legacy TCM fabric modules */
452         struct se_session       *se_sess;
453         struct se_tmr_req       *se_tmr_req;
454         struct list_head        se_queue_node;
455         struct target_core_fabric_ops *se_tfo;
456         int (*transport_emulate_cdb)(struct se_cmd *);
457         void (*transport_complete_callback)(struct se_cmd *);
458
459         unsigned char           *t_task_cdb;
460         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
461         unsigned long long      t_task_lba;
462         int                     t_tasks_failed;
463         int                     t_tasks_fua;
464         bool                    t_tasks_bidi;
465         u32                     t_tasks_sg_chained_no;
466         atomic_t                t_fe_count;
467         atomic_t                t_se_count;
468         atomic_t                t_task_cdbs_left;
469         atomic_t                t_task_cdbs_ex_left;
470         atomic_t                t_task_cdbs_sent;
471         atomic_t                t_transport_aborted;
472         atomic_t                t_transport_active;
473         atomic_t                t_transport_complete;
474         atomic_t                t_transport_queue_active;
475         atomic_t                t_transport_sent;
476         atomic_t                t_transport_stop;
477         atomic_t                transport_dev_active;
478         atomic_t                transport_lun_active;
479         atomic_t                transport_lun_fe_stop;
480         atomic_t                transport_lun_stop;
481         spinlock_t              t_state_lock;
482         struct completion       t_transport_stop_comp;
483         struct completion       transport_lun_fe_stop_comp;
484         struct completion       transport_lun_stop_comp;
485         struct scatterlist      *t_tasks_sg_chained;
486
487         struct work_struct      work;
488
489         /*
490          * Used for pre-registered fabric SGL passthrough WRITE and READ
491          * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
492          * and other HW target mode fabric modules.
493          */
494         struct scatterlist      *t_task_pt_sgl;
495         u32                     t_task_pt_sgl_num;
496
497         struct scatterlist      *t_data_sg;
498         unsigned int            t_data_nents;
499         struct scatterlist      *t_bidi_data_sg;
500         unsigned int            t_bidi_data_nents;
501
502         /* Used for BIDI READ */
503         struct list_head        t_task_list;
504         u32                     t_task_list_num;
505
506 } ____cacheline_aligned;
507
508 struct se_tmr_req {
509         /* Task Management function to be preformed */
510         u8                      function;
511         /* Task Management response to send */
512         u8                      response;
513         int                     call_transport;
514         /* Reference to ITT that Task Mgmt should be preformed */
515         u32                     ref_task_tag;
516         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
517         u64                     ref_task_lun;
518         void                    *fabric_tmr_ptr;
519         struct se_cmd           *task_cmd;
520         struct se_cmd           *ref_cmd;
521         struct se_device        *tmr_dev;
522         struct se_lun           *tmr_lun;
523         struct list_head        tmr_list;
524 } ____cacheline_aligned;
525
526 struct se_ua {
527         u8                      ua_asc;
528         u8                      ua_ascq;
529         struct se_node_acl      *ua_nacl;
530         struct list_head        ua_dev_list;
531         struct list_head        ua_nacl_list;
532 } ____cacheline_aligned;
533
534 struct se_node_acl {
535         char                    initiatorname[TRANSPORT_IQN_LEN];
536         /* Used to signal demo mode created ACL, disabled by default */
537         bool                    dynamic_node_acl;
538         u32                     queue_depth;
539         u32                     acl_index;
540         u64                     num_cmds;
541         u64                     read_bytes;
542         u64                     write_bytes;
543         spinlock_t              stats_lock;
544         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
545         atomic_t                acl_pr_ref_count;
546         struct se_dev_entry     *device_list;
547         struct se_session       *nacl_sess;
548         struct se_portal_group *se_tpg;
549         spinlock_t              device_list_lock;
550         spinlock_t              nacl_sess_lock;
551         struct config_group     acl_group;
552         struct config_group     acl_attrib_group;
553         struct config_group     acl_auth_group;
554         struct config_group     acl_param_group;
555         struct config_group     acl_fabric_stat_group;
556         struct config_group     *acl_default_groups[5];
557         struct list_head        acl_list;
558         struct list_head        acl_sess_list;
559 } ____cacheline_aligned;
560
561 struct se_session {
562         u64                     sess_bin_isid;
563         struct se_node_acl      *se_node_acl;
564         struct se_portal_group *se_tpg;
565         void                    *fabric_sess_ptr;
566         struct list_head        sess_list;
567         struct list_head        sess_acl_list;
568 } ____cacheline_aligned;
569
570 struct se_device;
571 struct se_transform_info;
572 struct scatterlist;
573
574 struct se_ml_stat_grps {
575         struct config_group     stat_group;
576         struct config_group     scsi_auth_intr_group;
577         struct config_group     scsi_att_intr_port_group;
578 };
579
580 struct se_lun_acl {
581         char                    initiatorname[TRANSPORT_IQN_LEN];
582         u32                     mapped_lun;
583         struct se_node_acl      *se_lun_nacl;
584         struct se_lun           *se_lun;
585         struct list_head        lacl_list;
586         struct config_group     se_lun_group;
587         struct se_ml_stat_grps  ml_stat_grps;
588 }  ____cacheline_aligned;
589
590 struct se_dev_entry {
591         bool                    def_pr_registered;
592         /* See transport_lunflags_table */
593         u32                     lun_flags;
594         u32                     deve_cmds;
595         u32                     mapped_lun;
596         u32                     average_bytes;
597         u32                     last_byte_count;
598         u32                     total_cmds;
599         u32                     total_bytes;
600         u64                     pr_res_key;
601         u64                     creation_time;
602         u32                     attach_count;
603         u64                     read_bytes;
604         u64                     write_bytes;
605         atomic_t                ua_count;
606         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
607         atomic_t                pr_ref_count;
608         struct se_lun_acl       *se_lun_acl;
609         spinlock_t              ua_lock;
610         struct se_lun           *se_lun;
611         struct list_head        alua_port_list;
612         struct list_head        ua_list;
613 }  ____cacheline_aligned;
614
615 struct se_dev_limits {
616         /* Max supported HW queue depth */
617         u32             hw_queue_depth;
618         /* Max supported virtual queue depth */
619         u32             queue_depth;
620         /* From include/linux/blkdev.h for the other HW/SW limits. */
621         struct queue_limits limits;
622 } ____cacheline_aligned;
623
624 struct se_dev_attrib {
625         int             emulate_dpo;
626         int             emulate_fua_write;
627         int             emulate_fua_read;
628         int             emulate_write_cache;
629         int             emulate_ua_intlck_ctrl;
630         int             emulate_tas;
631         int             emulate_tpu;
632         int             emulate_tpws;
633         int             emulate_reservations;
634         int             emulate_alua;
635         int             enforce_pr_isids;
636         int             is_nonrot;
637         int             emulate_rest_reord;
638         u32             hw_block_size;
639         u32             block_size;
640         u32             hw_max_sectors;
641         u32             max_sectors;
642         u32             optimal_sectors;
643         u32             hw_queue_depth;
644         u32             queue_depth;
645         u32             max_unmap_lba_count;
646         u32             max_unmap_block_desc_count;
647         u32             unmap_granularity;
648         u32             unmap_granularity_alignment;
649         struct se_subsystem_dev *da_sub_dev;
650         struct config_group da_group;
651 } ____cacheline_aligned;
652
653 struct se_dev_stat_grps {
654         struct config_group stat_group;
655         struct config_group scsi_dev_group;
656         struct config_group scsi_tgt_dev_group;
657         struct config_group scsi_lu_group;
658 };
659
660 struct se_subsystem_dev {
661 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
662 #define SE_DEV_ALIAS_LEN                512
663         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
664 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
665 #define SE_UDEV_PATH_LEN                512
666         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
667         u32             su_dev_flags;
668         struct se_hba *se_dev_hba;
669         struct se_device *se_dev_ptr;
670         struct se_dev_attrib se_dev_attrib;
671         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
672         struct t10_alua t10_alua;
673         /* T10 Inquiry and VPD WWN Information */
674         struct t10_wwn  t10_wwn;
675         /* T10 SPC-2 + SPC-3 Reservations */
676         struct t10_reservation t10_pr;
677         spinlock_t      se_dev_lock;
678         void            *se_dev_su_ptr;
679         struct list_head se_dev_node;
680         struct config_group se_dev_group;
681         /* For T10 Reservations */
682         struct config_group se_dev_pr_group;
683         /* For target_core_stat.c groups */
684         struct se_dev_stat_grps dev_stat_grps;
685 } ____cacheline_aligned;
686
687 struct se_device {
688         /* Set to 1 if thread is NOT sleeping on thread_sem */
689         u8                      thread_active;
690         u8                      dev_status_timer_flags;
691         /* RELATIVE TARGET PORT IDENTIFER Counter */
692         u16                     dev_rpti_counter;
693         /* Used for SAM Task Attribute ordering */
694         u32                     dev_cur_ordered_id;
695         u32                     dev_flags;
696         u32                     dev_port_count;
697         /* See transport_device_status_table */
698         u32                     dev_status;
699         u32                     dev_tcq_window_closed;
700         /* Physical device queue depth */
701         u32                     queue_depth;
702         /* Used for SPC-2 reservations enforce of ISIDs */
703         u64                     dev_res_bin_isid;
704         t10_task_attr_index_t   dev_task_attr_type;
705         /* Pointer to transport specific device structure */
706         void                    *dev_ptr;
707         u32                     dev_index;
708         u64                     creation_time;
709         u32                     num_resets;
710         u64                     num_cmds;
711         u64                     read_bytes;
712         u64                     write_bytes;
713         spinlock_t              stats_lock;
714         /* Active commands on this virtual SE device */
715         atomic_t                active_cmds;
716         atomic_t                simple_cmds;
717         atomic_t                depth_left;
718         atomic_t                dev_ordered_id;
719         atomic_t                dev_tur_active;
720         atomic_t                execute_tasks;
721         atomic_t                dev_status_thr_count;
722         atomic_t                dev_hoq_count;
723         atomic_t                dev_ordered_sync;
724         atomic_t                dev_qf_count;
725         struct se_obj           dev_obj;
726         struct se_obj           dev_access_obj;
727         struct se_obj           dev_export_obj;
728         struct se_queue_obj     dev_queue_obj;
729         spinlock_t              delayed_cmd_lock;
730         spinlock_t              ordered_cmd_lock;
731         spinlock_t              execute_task_lock;
732         spinlock_t              state_task_lock;
733         spinlock_t              dev_alua_lock;
734         spinlock_t              dev_reservation_lock;
735         spinlock_t              dev_state_lock;
736         spinlock_t              dev_status_lock;
737         spinlock_t              dev_status_thr_lock;
738         spinlock_t              se_port_lock;
739         spinlock_t              se_tmr_lock;
740         spinlock_t              qf_cmd_lock;
741         /* Used for legacy SPC-2 reservationsa */
742         struct se_node_acl      *dev_reserved_node_acl;
743         /* Used for ALUA Logical Unit Group membership */
744         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
745         /* Used for SPC-3 Persistent Reservations */
746         struct t10_pr_registration *dev_pr_res_holder;
747         struct list_head        dev_sep_list;
748         struct list_head        dev_tmr_list;
749         struct timer_list       dev_status_timer;
750         /* Pointer to descriptor for processing thread */
751         struct task_struct      *process_thread;
752         pid_t                   process_thread_pid;
753         struct task_struct              *dev_mgmt_thread;
754         struct work_struct      qf_work_queue;
755         struct list_head        delayed_cmd_list;
756         struct list_head        ordered_cmd_list;
757         struct list_head        execute_task_list;
758         struct list_head        state_task_list;
759         struct list_head        qf_cmd_list;
760         /* Pointer to associated SE HBA */
761         struct se_hba           *se_hba;
762         struct se_subsystem_dev *se_sub_dev;
763         /* Pointer to template of function pointers for transport */
764         struct se_subsystem_api *transport;
765         /* Linked list for struct se_hba struct se_device list */
766         struct list_head        dev_list;
767         /* Linked list for struct se_global->g_se_dev_list */
768         struct list_head        g_se_dev_list;
769 }  ____cacheline_aligned;
770
771 struct se_hba {
772         u16                     hba_tpgt;
773         u32                     hba_id;
774         /* See hba_flags_table */
775         u32                     hba_flags;
776         /* Virtual iSCSI devices attached. */
777         u32                     dev_count;
778         u32                     hba_index;
779         /* Pointer to transport specific host structure. */
780         void                    *hba_ptr;
781         /* Linked list for struct se_device */
782         struct list_head        hba_dev_list;
783         struct list_head        hba_node;
784         spinlock_t              device_lock;
785         struct config_group     hba_group;
786         struct mutex            hba_access_mutex;
787         struct se_subsystem_api *transport;
788 }  ____cacheline_aligned;
789
790 struct se_port_stat_grps {
791         struct config_group stat_group;
792         struct config_group scsi_port_group;
793         struct config_group scsi_tgt_port_group;
794         struct config_group scsi_transport_group;
795 };
796
797 struct se_lun {
798         /* See transport_lun_status_table */
799         enum transport_lun_status_table lun_status;
800         u32                     lun_access;
801         u32                     lun_flags;
802         u32                     unpacked_lun;
803         atomic_t                lun_acl_count;
804         spinlock_t              lun_acl_lock;
805         spinlock_t              lun_cmd_lock;
806         spinlock_t              lun_sep_lock;
807         struct completion       lun_shutdown_comp;
808         struct list_head        lun_cmd_list;
809         struct list_head        lun_acl_list;
810         struct se_device        *lun_se_dev;
811         struct se_port          *lun_sep;
812         struct config_group     lun_group;
813         struct se_port_stat_grps port_stat_grps;
814 } ____cacheline_aligned;
815
816 struct scsi_port_stats {
817        u64     cmd_pdus;
818        u64     tx_data_octets;
819        u64     rx_data_octets;
820 } ____cacheline_aligned;
821
822 struct se_port {
823         /* RELATIVE TARGET PORT IDENTIFER */
824         u16             sep_rtpi;
825         int             sep_tg_pt_secondary_stat;
826         int             sep_tg_pt_secondary_write_md;
827         u32             sep_index;
828         struct scsi_port_stats sep_stats;
829         /* Used for ALUA Target Port Groups membership */
830         atomic_t        sep_tg_pt_gp_active;
831         atomic_t        sep_tg_pt_secondary_offline;
832         /* Used for PR ALL_TG_PT=1 */
833         atomic_t        sep_tg_pt_ref_cnt;
834         spinlock_t      sep_alua_lock;
835         struct mutex    sep_tg_pt_md_mutex;
836         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
837         struct se_lun *sep_lun;
838         struct se_portal_group *sep_tpg;
839         struct list_head sep_alua_list;
840         struct list_head sep_list;
841 } ____cacheline_aligned;
842
843 struct se_tpg_np {
844         struct se_portal_group *tpg_np_parent;
845         struct config_group     tpg_np_group;
846 } ____cacheline_aligned;
847
848 struct se_portal_group {
849         /* Type of target portal group, see transport_tpg_type_table */
850         enum transport_tpg_type_table se_tpg_type;
851         /* Number of ACLed Initiator Nodes for this TPG */
852         u32                     num_node_acls;
853         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
854         atomic_t                tpg_pr_ref_count;
855         /* Spinlock for adding/removing ACLed Nodes */
856         spinlock_t              acl_node_lock;
857         /* Spinlock for adding/removing sessions */
858         spinlock_t              session_lock;
859         spinlock_t              tpg_lun_lock;
860         /* Pointer to $FABRIC_MOD portal group */
861         void                    *se_tpg_fabric_ptr;
862         struct list_head        se_tpg_node;
863         /* linked list for initiator ACL list */
864         struct list_head        acl_node_list;
865         struct se_lun           *tpg_lun_list;
866         struct se_lun           tpg_virt_lun0;
867         /* List of TCM sessions associated wth this TPG */
868         struct list_head        tpg_sess_list;
869         /* Pointer to $FABRIC_MOD dependent code */
870         struct target_core_fabric_ops *se_tpg_tfo;
871         struct se_wwn           *se_tpg_wwn;
872         struct config_group     tpg_group;
873         struct config_group     *tpg_default_groups[6];
874         struct config_group     tpg_lun_group;
875         struct config_group     tpg_np_group;
876         struct config_group     tpg_acl_group;
877         struct config_group     tpg_attrib_group;
878         struct config_group     tpg_param_group;
879 } ____cacheline_aligned;
880
881 struct se_wwn {
882         struct target_fabric_configfs *wwn_tf;
883         struct config_group     wwn_group;
884         struct config_group     *wwn_default_groups[2];
885         struct config_group     fabric_stat_group;
886 } ____cacheline_aligned;
887
888 #endif /* TARGET_CORE_BASE_H */