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