target: Add SCF_EMULATE_QUEUE_FULL -> transport_handle_queue_full
[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         "v4.0.0-rc7-ml"
13 #define SHUTDOWN_SIGS   (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
14
15 /* Used by transport_generic_allocate_iovecs() */
16 #define TRANSPORT_IOV_DATA_BUFFER               5
17 /* Maximum Number of LUNs per Target Portal Group */
18 #define TRANSPORT_MAX_LUNS_PER_TPG              256
19 /*
20  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
21  *
22  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
23  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
24  * 16-byte CDBs by default and require an extra allocation for
25  * 32-byte CDBs to because of legacy issues.
26  *
27  * Within TCM Core there are no such legacy limitiations, so we go ahead
28  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
29  * within all TCM Core and subsystem plugin code.
30  */
31 #define TCM_MAX_COMMAND_SIZE                    32
32 /*
33  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
34  * defined 96, but the real limit is 252 (or 260 including the header)
35  */
36 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
37 /* Used by transport_send_check_condition_and_sense() */
38 #define SPC_SENSE_KEY_OFFSET                    2
39 #define SPC_ASC_KEY_OFFSET                      12
40 #define SPC_ASCQ_KEY_OFFSET                     13
41 #define TRANSPORT_IQN_LEN                       224
42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
43 #define LU_GROUP_NAME_BUF                       256
44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
45 #define TG_PT_GROUP_NAME_BUF                    256
46 /* Used to parse VPD into struct t10_vpd */
47 #define VPD_TMP_BUF_SIZE                        128
48 /* Used by transport_generic_cmd_sequencer() */
49 #define READ_BLOCK_LEN                          6
50 #define READ_CAP_LEN                            8
51 #define READ_POSITION_LEN                       20
52 #define INQUIRY_LEN                             36
53 /* Used by transport_get_inquiry_vpd_serial() */
54 #define INQUIRY_VPD_SERIAL_LEN                  254
55 /* Used by transport_get_inquiry_vpd_device_ident() */
56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
57
58 /* struct se_hba->hba_flags */
59 enum hba_flags_table {
60         HBA_FLAGS_INTERNAL_USE  = 0x01,
61         HBA_FLAGS_PSCSI_MODE    = 0x02,
62 };
63
64 /* struct se_lun->lun_status */
65 enum transport_lun_status_table {
66         TRANSPORT_LUN_STATUS_FREE = 0,
67         TRANSPORT_LUN_STATUS_ACTIVE = 1,
68 };
69
70 /* struct se_portal_group->se_tpg_type */
71 enum transport_tpg_type_table {
72         TRANSPORT_TPG_TYPE_NORMAL = 0,
73         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
74 };
75
76 /* Used for generate timer flags */
77 enum timer_flags_table {
78         TF_RUNNING      = 0x01,
79         TF_STOP         = 0x02,
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_DEFERRED_CMD  = 2,
87         TRANSPORT_WRITE_PENDING = 3,
88         TRANSPORT_PROCESS_WRITE = 4,
89         TRANSPORT_PROCESSING    = 5,
90         TRANSPORT_COMPLETE_OK   = 6,
91         TRANSPORT_COMPLETE_FAILURE = 7,
92         TRANSPORT_COMPLETE_TIMEOUT = 8,
93         TRANSPORT_PROCESS_TMR   = 9,
94         TRANSPORT_TMR_COMPLETE  = 10,
95         TRANSPORT_ISTATE_PROCESSING = 11,
96         TRANSPORT_ISTATE_PROCESSED = 12,
97         TRANSPORT_KILL          = 13,
98         TRANSPORT_REMOVE        = 14,
99         TRANSPORT_FREE          = 15,
100         TRANSPORT_NEW_CMD_MAP   = 16,
101         TRANSPORT_FREE_CMD_INTR = 17,
102         TRANSPORT_COMPLETE_QF_WP = 18,
103 };
104
105 /* Used for struct se_cmd->se_cmd_flags */
106 enum se_cmd_flags_table {
107         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
108         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
109         SCF_EMULATED_TASK_SENSE         = 0x00000004,
110         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
111         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
112         SCF_SCSI_CONTROL_NONSG_IO_CDB   = 0x00000020,
113         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
114         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
115         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
116         SCF_SE_CMD_FAILED               = 0x00000400,
117         SCF_SE_LUN_CMD                  = 0x00000800,
118         SCF_SE_ALLOW_EOO                = 0x00001000,
119         SCF_SENT_CHECK_CONDITION        = 0x00004000,
120         SCF_OVERFLOW_BIT                = 0x00008000,
121         SCF_UNDERFLOW_BIT               = 0x00010000,
122         SCF_SENT_DELAYED_TAS            = 0x00020000,
123         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
124         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
125         SCF_UNUSED                      = 0x00100000,
126         SCF_PASSTHROUGH_CONTIG_TO_SG    = 0x00200000,
127         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
128         SCF_EMULATE_CDB_ASYNC           = 0x01000000,
129         SCF_EMULATE_QUEUE_FULL          = 0x02000000,
130 };
131
132 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
133 enum transport_lunflags_table {
134         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
135         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
136         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
137         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
138 };
139
140 /* struct se_device->dev_status */
141 enum transport_device_status_table {
142         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
143         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
144         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
145         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
146         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
147         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
148 };
149
150 /*
151  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
152  * to signal which ASC/ASCQ sense payload should be built.
153  */
154 enum tcm_sense_reason_table {
155         TCM_NON_EXISTENT_LUN                    = 0x01,
156         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
157         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
158         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
159         TCM_SERVICE_CRC_ERROR                   = 0x05,
160         TCM_SNACK_REJECTED                      = 0x06,
161         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
162         TCM_INVALID_CDB_FIELD                   = 0x08,
163         TCM_INVALID_PARAMETER_LIST              = 0x09,
164         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
165         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
166         TCM_WRITE_PROTECTED                     = 0x0c,
167         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
168         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
169         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
170 };
171
172 struct se_obj {
173         atomic_t obj_access_count;
174 } ____cacheline_aligned;
175
176 /*
177  * Used by TCM Core internally to signal if ALUA emulation is enabled or
178  * disabled, or running in with TCM/pSCSI passthrough mode
179  */
180 typedef enum {
181         SPC_ALUA_PASSTHROUGH,
182         SPC2_ALUA_DISABLED,
183         SPC3_ALUA_EMULATED
184 } t10_alua_index_t;
185
186 /*
187  * Used by TCM Core internally to signal if SAM Task Attribute emulation
188  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
189  */
190 typedef enum {
191         SAM_TASK_ATTR_PASSTHROUGH,
192         SAM_TASK_ATTR_UNTAGGED,
193         SAM_TASK_ATTR_EMULATED
194 } t10_task_attr_index_t;
195
196 /*
197  * Used for target SCSI statistics
198  */
199 typedef enum {
200         SCSI_INST_INDEX,
201         SCSI_DEVICE_INDEX,
202         SCSI_AUTH_INTR_INDEX,
203         SCSI_INDEX_TYPE_MAX
204 } scsi_index_t;
205
206 struct se_cmd;
207
208 struct t10_alua {
209         t10_alua_index_t alua_type;
210         /* ALUA Target Port Group ID */
211         u16     alua_tg_pt_gps_counter;
212         u32     alua_tg_pt_gps_count;
213         spinlock_t tg_pt_gps_lock;
214         struct se_subsystem_dev *t10_sub_dev;
215         /* Used for default ALUA Target Port Group */
216         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
217         /* Used for default ALUA Target Port Group ConfigFS group */
218         struct config_group alua_tg_pt_gps_group;
219         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
220         struct list_head tg_pt_gps_list;
221 } ____cacheline_aligned;
222
223 struct t10_alua_lu_gp {
224         u16     lu_gp_id;
225         int     lu_gp_valid_id;
226         u32     lu_gp_members;
227         atomic_t lu_gp_shutdown;
228         atomic_t lu_gp_ref_cnt;
229         spinlock_t lu_gp_lock;
230         struct config_group lu_gp_group;
231         struct list_head lu_gp_node;
232         struct list_head lu_gp_mem_list;
233 } ____cacheline_aligned;
234
235 struct t10_alua_lu_gp_member {
236         bool lu_gp_assoc;
237         atomic_t lu_gp_mem_ref_cnt;
238         spinlock_t lu_gp_mem_lock;
239         struct t10_alua_lu_gp *lu_gp;
240         struct se_device *lu_gp_mem_dev;
241         struct list_head lu_gp_mem_list;
242 } ____cacheline_aligned;
243
244 struct t10_alua_tg_pt_gp {
245         u16     tg_pt_gp_id;
246         int     tg_pt_gp_valid_id;
247         int     tg_pt_gp_alua_access_status;
248         int     tg_pt_gp_alua_access_type;
249         int     tg_pt_gp_nonop_delay_msecs;
250         int     tg_pt_gp_trans_delay_msecs;
251         int     tg_pt_gp_pref;
252         int     tg_pt_gp_write_metadata;
253         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
254 #define ALUA_MD_BUF_LEN                         1024
255         u32     tg_pt_gp_md_buf_len;
256         u32     tg_pt_gp_members;
257         atomic_t tg_pt_gp_alua_access_state;
258         atomic_t tg_pt_gp_ref_cnt;
259         spinlock_t tg_pt_gp_lock;
260         struct mutex tg_pt_gp_md_mutex;
261         struct se_subsystem_dev *tg_pt_gp_su_dev;
262         struct config_group tg_pt_gp_group;
263         struct list_head tg_pt_gp_list;
264         struct list_head tg_pt_gp_mem_list;
265 } ____cacheline_aligned;
266
267 struct t10_alua_tg_pt_gp_member {
268         bool tg_pt_gp_assoc;
269         atomic_t tg_pt_gp_mem_ref_cnt;
270         spinlock_t tg_pt_gp_mem_lock;
271         struct t10_alua_tg_pt_gp *tg_pt_gp;
272         struct se_port *tg_pt;
273         struct list_head tg_pt_gp_mem_list;
274 } ____cacheline_aligned;
275
276 struct t10_vpd {
277         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
278         int protocol_identifier_set;
279         u32 protocol_identifier;
280         u32 device_identifier_code_set;
281         u32 association;
282         u32 device_identifier_type;
283         struct list_head vpd_list;
284 } ____cacheline_aligned;
285
286 struct t10_wwn {
287         char vendor[8];
288         char model[16];
289         char revision[4];
290         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
291         spinlock_t t10_vpd_lock;
292         struct se_subsystem_dev *t10_sub_dev;
293         struct config_group t10_wwn_group;
294         struct list_head t10_vpd_list;
295 } ____cacheline_aligned;
296
297
298 /*
299  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
300  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
301  * mode
302  */
303 typedef enum {
304         SPC_PASSTHROUGH,
305         SPC2_RESERVATIONS,
306         SPC3_PERSISTENT_RESERVATIONS
307 } t10_reservations_index_t;
308
309 struct t10_pr_registration {
310         /* Used for fabrics that contain WWN+ISID */
311 #define PR_REG_ISID_LEN                         16
312         /* PR_REG_ISID_LEN + ',i,0x' */
313 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
314         char pr_reg_isid[PR_REG_ISID_LEN];
315         /* Used during APTPL metadata reading */
316 #define PR_APTPL_MAX_IPORT_LEN                  256
317         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
318         /* Used during APTPL metadata reading */
319 #define PR_APTPL_MAX_TPORT_LEN                  256
320         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
321         /* For writing out live meta data */
322         unsigned char *pr_aptpl_buf;
323         u16 pr_aptpl_rpti;
324         u16 pr_reg_tpgt;
325         /* Reservation effects all target ports */
326         int pr_reg_all_tg_pt;
327         /* Activate Persistence across Target Power Loss */
328         int pr_reg_aptpl;
329         int pr_res_holder;
330         int pr_res_type;
331         int pr_res_scope;
332         /* Used for fabric initiator WWPNs using a ISID */
333         bool isid_present_at_reg;
334         u32 pr_res_mapped_lun;
335         u32 pr_aptpl_target_lun;
336         u32 pr_res_generation;
337         u64 pr_reg_bin_isid;
338         u64 pr_res_key;
339         atomic_t pr_res_holders;
340         struct se_node_acl *pr_reg_nacl;
341         struct se_dev_entry *pr_reg_deve;
342         struct se_lun *pr_reg_tg_pt_lun;
343         struct list_head pr_reg_list;
344         struct list_head pr_reg_abort_list;
345         struct list_head pr_reg_aptpl_list;
346         struct list_head pr_reg_atp_list;
347         struct list_head pr_reg_atp_mem_list;
348 } ____cacheline_aligned;
349
350 /*
351  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
352  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
353  * core_setup_reservations()
354  */
355 struct t10_reservation_ops {
356         int (*t10_reservation_check)(struct se_cmd *, u32 *);
357         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
358         int (*t10_pr_register)(struct se_cmd *);
359         int (*t10_pr_clear)(struct se_cmd *);
360 };
361
362 struct t10_reservation {
363         /* Reservation effects all target ports */
364         int pr_all_tg_pt;
365         /* Activate Persistence across Target Power Loss enabled
366          * for SCSI device */
367         int pr_aptpl_active;
368         /* Used by struct t10_reservation->pr_aptpl_buf_len */
369 #define PR_APTPL_BUF_LEN                        8192
370         u32 pr_aptpl_buf_len;
371         u32 pr_generation;
372         t10_reservations_index_t res_type;
373         spinlock_t registration_lock;
374         spinlock_t aptpl_reg_lock;
375         /*
376          * This will always be set by one individual I_T Nexus.
377          * However with all_tg_pt=1, other I_T Nexus from the
378          * same initiator can access PR reg/res info on a different
379          * target port.
380          *
381          * There is also the 'All Registrants' case, where there is
382          * a single *pr_res_holder of the reservation, but all
383          * registrations are considered reservation holders.
384          */
385         struct se_node_acl *pr_res_holder;
386         struct list_head registration_list;
387         struct list_head aptpl_reg_list;
388         struct t10_reservation_ops pr_ops;
389 } ____cacheline_aligned;
390
391 struct se_queue_req {
392         int                     state;
393         struct se_cmd           *cmd;
394         struct list_head        qr_list;
395 } ____cacheline_aligned;
396
397 struct se_queue_obj {
398         atomic_t                queue_cnt;
399         spinlock_t              cmd_queue_lock;
400         struct list_head        qobj_list;
401         wait_queue_head_t       thread_wq;
402 } ____cacheline_aligned;
403
404 struct se_task {
405         unsigned char   task_sense;
406         struct scatterlist *task_sg;
407         u32             task_sg_num;
408         struct scatterlist *task_sg_bidi;
409         u8              task_scsi_status;
410         u8              task_flags;
411         int             task_error_status;
412         int             task_state_flags;
413         bool            task_padded_sg;
414         unsigned long long      task_lba;
415         u32             task_no;
416         u32             task_sectors;
417         u32             task_size;
418         enum dma_data_direction task_data_direction;
419         struct se_cmd *task_se_cmd;
420         struct se_device        *se_dev;
421         struct completion       task_stop_comp;
422         atomic_t        task_active;
423         atomic_t        task_execute_queue;
424         atomic_t        task_timeout;
425         atomic_t        task_sent;
426         atomic_t        task_stop;
427         atomic_t        task_state_active;
428         struct timer_list       task_timer;
429         struct se_device *se_obj_ptr;
430         struct list_head t_list;
431         struct list_head t_execute_list;
432         struct list_head t_state_list;
433 } ____cacheline_aligned;
434
435 struct se_cmd {
436         /* SAM response code being sent to initiator */
437         u8                      scsi_status;
438         u8                      scsi_asc;
439         u8                      scsi_ascq;
440         u8                      scsi_sense_reason;
441         u16                     scsi_sense_length;
442         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
443         int                     alua_nonop_delay;
444         /* See include/linux/dma-mapping.h */
445         enum dma_data_direction data_direction;
446         /* For SAM Task Attribute */
447         int                     sam_task_attr;
448         /* Transport protocol dependent state, see transport_state_table */
449         enum transport_state_table t_state;
450         /* Transport protocol dependent state for out of order CmdSNs */
451         int                     deferred_t_state;
452         /* Transport specific error status */
453         int                     transport_error_status;
454         /* See se_cmd_flags_table */
455         u32                     se_cmd_flags;
456         u32                     se_ordered_id;
457         /* Total size in bytes associated with command */
458         u32                     data_length;
459         /* SCSI Presented Data Transfer Length */
460         u32                     cmd_spdtl;
461         u32                     residual_count;
462         u32                     orig_fe_lun;
463         /* Persistent Reservation key */
464         u64                     pr_res_key;
465         atomic_t                transport_sent;
466         /* Used for sense data */
467         void                    *sense_buffer;
468         struct list_head        se_delayed_node;
469         struct list_head        se_ordered_node;
470         struct list_head        se_lun_node;
471         struct list_head        se_qf_node;
472         struct se_device      *se_dev;
473         struct se_dev_entry   *se_deve;
474         struct se_device        *se_obj_ptr;
475         struct se_device        *se_orig_obj_ptr;
476         struct se_lun           *se_lun;
477         /* Only used for internal passthrough and legacy TCM fabric modules */
478         struct se_session       *se_sess;
479         struct se_tmr_req       *se_tmr_req;
480         struct list_head        se_queue_node;
481         struct target_core_fabric_ops *se_tfo;
482         int (*transport_emulate_cdb)(struct se_cmd *);
483         void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
484         void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
485         void (*transport_complete_callback)(struct se_cmd *);
486         int (*transport_qf_callback)(struct se_cmd *);
487
488         unsigned char           *t_task_cdb;
489         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
490         unsigned long long      t_task_lba;
491         int                     t_tasks_failed;
492         int                     t_tasks_fua;
493         bool                    t_tasks_bidi;
494         u32                     t_tasks_se_num;
495         u32                     t_tasks_se_bidi_num;
496         u32                     t_tasks_sg_chained_no;
497         atomic_t                t_fe_count;
498         atomic_t                t_se_count;
499         atomic_t                t_task_cdbs_left;
500         atomic_t                t_task_cdbs_ex_left;
501         atomic_t                t_task_cdbs_timeout_left;
502         atomic_t                t_task_cdbs_sent;
503         atomic_t                t_transport_aborted;
504         atomic_t                t_transport_active;
505         atomic_t                t_transport_complete;
506         atomic_t                t_transport_queue_active;
507         atomic_t                t_transport_sent;
508         atomic_t                t_transport_stop;
509         atomic_t                t_transport_timeout;
510         atomic_t                transport_dev_active;
511         atomic_t                transport_lun_active;
512         atomic_t                transport_lun_fe_stop;
513         atomic_t                transport_lun_stop;
514         spinlock_t              t_state_lock;
515         struct completion       t_transport_stop_comp;
516         struct completion       transport_lun_fe_stop_comp;
517         struct completion       transport_lun_stop_comp;
518         struct scatterlist      *t_tasks_sg_chained;
519         struct scatterlist      t_tasks_sg_bounce;
520         void                    *t_task_buf;
521         /*
522          * Used for pre-registered fabric SGL passthrough WRITE and READ
523          * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
524          * and other HW target mode fabric modules.
525          */
526         struct scatterlist      *t_task_pt_sgl;
527         u32                     t_task_pt_sgl_num;
528         struct list_head        t_mem_list;
529         /* Used for BIDI READ */
530         struct list_head        t_mem_bidi_list;
531         struct list_head        t_task_list;
532         u32                     t_task_list_num;
533
534 } ____cacheline_aligned;
535
536 struct se_tmr_req {
537         /* Task Management function to be preformed */
538         u8                      function;
539         /* Task Management response to send */
540         u8                      response;
541         int                     call_transport;
542         /* Reference to ITT that Task Mgmt should be preformed */
543         u32                     ref_task_tag;
544         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
545         u64                     ref_task_lun;
546         void                    *fabric_tmr_ptr;
547         struct se_cmd           *task_cmd;
548         struct se_cmd           *ref_cmd;
549         struct se_device        *tmr_dev;
550         struct se_lun           *tmr_lun;
551         struct list_head        tmr_list;
552 } ____cacheline_aligned;
553
554 struct se_ua {
555         u8                      ua_asc;
556         u8                      ua_ascq;
557         struct se_node_acl      *ua_nacl;
558         struct list_head        ua_dev_list;
559         struct list_head        ua_nacl_list;
560 } ____cacheline_aligned;
561
562 struct se_node_acl {
563         char                    initiatorname[TRANSPORT_IQN_LEN];
564         /* Used to signal demo mode created ACL, disabled by default */
565         bool                    dynamic_node_acl;
566         u32                     queue_depth;
567         u32                     acl_index;
568         u64                     num_cmds;
569         u64                     read_bytes;
570         u64                     write_bytes;
571         spinlock_t              stats_lock;
572         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
573         atomic_t                acl_pr_ref_count;
574         struct se_dev_entry     *device_list;
575         struct se_session       *nacl_sess;
576         struct se_portal_group *se_tpg;
577         spinlock_t              device_list_lock;
578         spinlock_t              nacl_sess_lock;
579         struct config_group     acl_group;
580         struct config_group     acl_attrib_group;
581         struct config_group     acl_auth_group;
582         struct config_group     acl_param_group;
583         struct config_group     acl_fabric_stat_group;
584         struct config_group     *acl_default_groups[5];
585         struct list_head        acl_list;
586         struct list_head        acl_sess_list;
587 } ____cacheline_aligned;
588
589 struct se_session {
590         u64                     sess_bin_isid;
591         struct se_node_acl      *se_node_acl;
592         struct se_portal_group *se_tpg;
593         void                    *fabric_sess_ptr;
594         struct list_head        sess_list;
595         struct list_head        sess_acl_list;
596 } ____cacheline_aligned;
597
598 struct se_device;
599 struct se_transform_info;
600 struct scatterlist;
601
602 struct se_ml_stat_grps {
603         struct config_group     stat_group;
604         struct config_group     scsi_auth_intr_group;
605         struct config_group     scsi_att_intr_port_group;
606 };
607
608 struct se_lun_acl {
609         char                    initiatorname[TRANSPORT_IQN_LEN];
610         u32                     mapped_lun;
611         struct se_node_acl      *se_lun_nacl;
612         struct se_lun           *se_lun;
613         struct list_head        lacl_list;
614         struct config_group     se_lun_group;
615         struct se_ml_stat_grps  ml_stat_grps;
616 }  ____cacheline_aligned;
617
618 struct se_dev_entry {
619         bool                    def_pr_registered;
620         /* See transport_lunflags_table */
621         u32                     lun_flags;
622         u32                     deve_cmds;
623         u32                     mapped_lun;
624         u32                     average_bytes;
625         u32                     last_byte_count;
626         u32                     total_cmds;
627         u32                     total_bytes;
628         u64                     pr_res_key;
629         u64                     creation_time;
630         u32                     attach_count;
631         u64                     read_bytes;
632         u64                     write_bytes;
633         atomic_t                ua_count;
634         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
635         atomic_t                pr_ref_count;
636         struct se_lun_acl       *se_lun_acl;
637         spinlock_t              ua_lock;
638         struct se_lun           *se_lun;
639         struct list_head        alua_port_list;
640         struct list_head        ua_list;
641 }  ____cacheline_aligned;
642
643 struct se_dev_limits {
644         /* Max supported HW queue depth */
645         u32             hw_queue_depth;
646         /* Max supported virtual queue depth */
647         u32             queue_depth;
648         /* From include/linux/blkdev.h for the other HW/SW limits. */
649         struct queue_limits limits;
650 } ____cacheline_aligned;
651
652 struct se_dev_attrib {
653         int             emulate_dpo;
654         int             emulate_fua_write;
655         int             emulate_fua_read;
656         int             emulate_write_cache;
657         int             emulate_ua_intlck_ctrl;
658         int             emulate_tas;
659         int             emulate_tpu;
660         int             emulate_tpws;
661         int             emulate_reservations;
662         int             emulate_alua;
663         int             enforce_pr_isids;
664         u32             hw_block_size;
665         u32             block_size;
666         u32             hw_max_sectors;
667         u32             max_sectors;
668         u32             optimal_sectors;
669         u32             hw_queue_depth;
670         u32             queue_depth;
671         u32             task_timeout;
672         u32             max_unmap_lba_count;
673         u32             max_unmap_block_desc_count;
674         u32             unmap_granularity;
675         u32             unmap_granularity_alignment;
676         struct se_subsystem_dev *da_sub_dev;
677         struct config_group da_group;
678 } ____cacheline_aligned;
679
680 struct se_dev_stat_grps {
681         struct config_group stat_group;
682         struct config_group scsi_dev_group;
683         struct config_group scsi_tgt_dev_group;
684         struct config_group scsi_lu_group;
685 };
686
687 struct se_subsystem_dev {
688 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
689 #define SE_DEV_ALIAS_LEN                512
690         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
691 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
692 #define SE_UDEV_PATH_LEN                512
693         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
694         u32             su_dev_flags;
695         struct se_hba *se_dev_hba;
696         struct se_device *se_dev_ptr;
697         struct se_dev_attrib se_dev_attrib;
698         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
699         struct t10_alua t10_alua;
700         /* T10 Inquiry and VPD WWN Information */
701         struct t10_wwn  t10_wwn;
702         /* T10 SPC-2 + SPC-3 Reservations */
703         struct t10_reservation t10_pr;
704         spinlock_t      se_dev_lock;
705         void            *se_dev_su_ptr;
706         struct list_head se_dev_node;
707         struct config_group se_dev_group;
708         /* For T10 Reservations */
709         struct config_group se_dev_pr_group;
710         /* For target_core_stat.c groups */
711         struct se_dev_stat_grps dev_stat_grps;
712 } ____cacheline_aligned;
713
714 struct se_device {
715         /* Set to 1 if thread is NOT sleeping on thread_sem */
716         u8                      thread_active;
717         u8                      dev_status_timer_flags;
718         /* RELATIVE TARGET PORT IDENTIFER Counter */
719         u16                     dev_rpti_counter;
720         /* Used for SAM Task Attribute ordering */
721         u32                     dev_cur_ordered_id;
722         u32                     dev_flags;
723         u32                     dev_port_count;
724         /* See transport_device_status_table */
725         u32                     dev_status;
726         u32                     dev_tcq_window_closed;
727         /* Physical device queue depth */
728         u32                     queue_depth;
729         /* Used for SPC-2 reservations enforce of ISIDs */
730         u64                     dev_res_bin_isid;
731         t10_task_attr_index_t   dev_task_attr_type;
732         /* Pointer to transport specific device structure */
733         void                    *dev_ptr;
734         u32                     dev_index;
735         u64                     creation_time;
736         u32                     num_resets;
737         u64                     num_cmds;
738         u64                     read_bytes;
739         u64                     write_bytes;
740         spinlock_t              stats_lock;
741         /* Active commands on this virtual SE device */
742         atomic_t                active_cmds;
743         atomic_t                simple_cmds;
744         atomic_t                depth_left;
745         atomic_t                dev_ordered_id;
746         atomic_t                dev_tur_active;
747         atomic_t                execute_tasks;
748         atomic_t                dev_status_thr_count;
749         atomic_t                dev_hoq_count;
750         atomic_t                dev_ordered_sync;
751         atomic_t                dev_qf_count;
752         struct se_obj           dev_obj;
753         struct se_obj           dev_access_obj;
754         struct se_obj           dev_export_obj;
755         struct se_queue_obj     dev_queue_obj;
756         spinlock_t              delayed_cmd_lock;
757         spinlock_t              ordered_cmd_lock;
758         spinlock_t              execute_task_lock;
759         spinlock_t              state_task_lock;
760         spinlock_t              dev_alua_lock;
761         spinlock_t              dev_reservation_lock;
762         spinlock_t              dev_state_lock;
763         spinlock_t              dev_status_lock;
764         spinlock_t              dev_status_thr_lock;
765         spinlock_t              se_port_lock;
766         spinlock_t              se_tmr_lock;
767         spinlock_t              qf_cmd_lock;
768         /* Used for legacy SPC-2 reservationsa */
769         struct se_node_acl      *dev_reserved_node_acl;
770         /* Used for ALUA Logical Unit Group membership */
771         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
772         /* Used for SPC-3 Persistent Reservations */
773         struct t10_pr_registration *dev_pr_res_holder;
774         struct list_head        dev_sep_list;
775         struct list_head        dev_tmr_list;
776         struct timer_list       dev_status_timer;
777         /* Pointer to descriptor for processing thread */
778         struct task_struct      *process_thread;
779         pid_t                   process_thread_pid;
780         struct task_struct              *dev_mgmt_thread;
781         struct work_struct      qf_work_queue;
782         struct list_head        delayed_cmd_list;
783         struct list_head        ordered_cmd_list;
784         struct list_head        execute_task_list;
785         struct list_head        state_task_list;
786         struct list_head        qf_cmd_list;
787         /* Pointer to associated SE HBA */
788         struct se_hba           *se_hba;
789         struct se_subsystem_dev *se_sub_dev;
790         /* Pointer to template of function pointers for transport */
791         struct se_subsystem_api *transport;
792         /* Linked list for struct se_hba struct se_device list */
793         struct list_head        dev_list;
794         /* Linked list for struct se_global->g_se_dev_list */
795         struct list_head        g_se_dev_list;
796 }  ____cacheline_aligned;
797
798 struct se_hba {
799         u16                     hba_tpgt;
800         u32                     hba_id;
801         /* See hba_flags_table */
802         u32                     hba_flags;
803         /* Virtual iSCSI devices attached. */
804         u32                     dev_count;
805         u32                     hba_index;
806         /* Pointer to transport specific host structure. */
807         void                    *hba_ptr;
808         /* Linked list for struct se_device */
809         struct list_head        hba_dev_list;
810         struct list_head        hba_node;
811         spinlock_t              device_lock;
812         struct config_group     hba_group;
813         struct mutex            hba_access_mutex;
814         struct se_subsystem_api *transport;
815 }  ____cacheline_aligned;
816
817 struct se_port_stat_grps {
818         struct config_group stat_group;
819         struct config_group scsi_port_group;
820         struct config_group scsi_tgt_port_group;
821         struct config_group scsi_transport_group;
822 };
823
824 struct se_lun {
825         /* See transport_lun_status_table */
826         enum transport_lun_status_table lun_status;
827         u32                     lun_access;
828         u32                     lun_flags;
829         u32                     unpacked_lun;
830         atomic_t                lun_acl_count;
831         spinlock_t              lun_acl_lock;
832         spinlock_t              lun_cmd_lock;
833         spinlock_t              lun_sep_lock;
834         struct completion       lun_shutdown_comp;
835         struct list_head        lun_cmd_list;
836         struct list_head        lun_acl_list;
837         struct se_device        *lun_se_dev;
838         struct se_port          *lun_sep;
839         struct config_group     lun_group;
840         struct se_port_stat_grps port_stat_grps;
841 } ____cacheline_aligned;
842
843 struct scsi_port_stats {
844        u64     cmd_pdus;
845        u64     tx_data_octets;
846        u64     rx_data_octets;
847 } ____cacheline_aligned;
848
849 struct se_port {
850         /* RELATIVE TARGET PORT IDENTIFER */
851         u16             sep_rtpi;
852         int             sep_tg_pt_secondary_stat;
853         int             sep_tg_pt_secondary_write_md;
854         u32             sep_index;
855         struct scsi_port_stats sep_stats;
856         /* Used for ALUA Target Port Groups membership */
857         atomic_t        sep_tg_pt_gp_active;
858         atomic_t        sep_tg_pt_secondary_offline;
859         /* Used for PR ALL_TG_PT=1 */
860         atomic_t        sep_tg_pt_ref_cnt;
861         spinlock_t      sep_alua_lock;
862         struct mutex    sep_tg_pt_md_mutex;
863         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
864         struct se_lun *sep_lun;
865         struct se_portal_group *sep_tpg;
866         struct list_head sep_alua_list;
867         struct list_head sep_list;
868 } ____cacheline_aligned;
869
870 struct se_tpg_np {
871         struct se_portal_group *tpg_np_parent;
872         struct config_group     tpg_np_group;
873 } ____cacheline_aligned;
874
875 struct se_portal_group {
876         /* Type of target portal group, see transport_tpg_type_table */
877         enum transport_tpg_type_table se_tpg_type;
878         /* Number of ACLed Initiator Nodes for this TPG */
879         u32                     num_node_acls;
880         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
881         atomic_t                tpg_pr_ref_count;
882         /* Spinlock for adding/removing ACLed Nodes */
883         spinlock_t              acl_node_lock;
884         /* Spinlock for adding/removing sessions */
885         spinlock_t              session_lock;
886         spinlock_t              tpg_lun_lock;
887         /* Pointer to $FABRIC_MOD portal group */
888         void                    *se_tpg_fabric_ptr;
889         struct list_head        se_tpg_node;
890         /* linked list for initiator ACL list */
891         struct list_head        acl_node_list;
892         struct se_lun           *tpg_lun_list;
893         struct se_lun           tpg_virt_lun0;
894         /* List of TCM sessions associated wth this TPG */
895         struct list_head        tpg_sess_list;
896         /* Pointer to $FABRIC_MOD dependent code */
897         struct target_core_fabric_ops *se_tpg_tfo;
898         struct se_wwn           *se_tpg_wwn;
899         struct config_group     tpg_group;
900         struct config_group     *tpg_default_groups[6];
901         struct config_group     tpg_lun_group;
902         struct config_group     tpg_np_group;
903         struct config_group     tpg_acl_group;
904         struct config_group     tpg_attrib_group;
905         struct config_group     tpg_param_group;
906 } ____cacheline_aligned;
907
908 struct se_wwn {
909         struct target_fabric_configfs *wwn_tf;
910         struct config_group     wwn_group;
911         struct config_group     *wwn_default_groups[2];
912         struct config_group     fabric_stat_group;
913 } ____cacheline_aligned;
914
915 #endif /* TARGET_CORE_BASE_H */