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[deliverable/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_TIMEOUT = (1 << 2),
79 TF_REQUEST_STOP = (1 << 3),
80 };
81
82 /* Special transport agnostic struct se_cmd->t_states */
83 enum transport_state_table {
84 TRANSPORT_NO_STATE = 0,
85 TRANSPORT_NEW_CMD = 1,
86 TRANSPORT_WRITE_PENDING = 3,
87 TRANSPORT_PROCESS_WRITE = 4,
88 TRANSPORT_PROCESSING = 5,
89 TRANSPORT_COMPLETE_OK = 6,
90 TRANSPORT_COMPLETE_FAILURE = 7,
91 TRANSPORT_COMPLETE_TIMEOUT = 8,
92 TRANSPORT_PROCESS_TMR = 9,
93 TRANSPORT_TMR_COMPLETE = 10,
94 TRANSPORT_ISTATE_PROCESSING = 11,
95 TRANSPORT_ISTATE_PROCESSED = 12,
96 TRANSPORT_KILL = 13,
97 TRANSPORT_FREE = 15,
98 TRANSPORT_NEW_CMD_MAP = 16,
99 TRANSPORT_FREE_CMD_INTR = 17,
100 TRANSPORT_COMPLETE_QF_WP = 18,
101 TRANSPORT_COMPLETE_QF_OK = 19,
102 };
103
104 /* Used for struct se_cmd->se_cmd_flags */
105 enum se_cmd_flags_table {
106 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
107 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
108 SCF_EMULATED_TASK_SENSE = 0x00000004,
109 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
110 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
111 SCF_SCSI_NON_DATA_CDB = 0x00000040,
112 SCF_SCSI_CDB_EXCEPTION = 0x00000080,
113 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
114 SCF_SE_CMD_FAILED = 0x00000400,
115 SCF_SE_LUN_CMD = 0x00000800,
116 SCF_SE_ALLOW_EOO = 0x00001000,
117 SCF_SENT_CHECK_CONDITION = 0x00004000,
118 SCF_OVERFLOW_BIT = 0x00008000,
119 SCF_UNDERFLOW_BIT = 0x00010000,
120 SCF_SENT_DELAYED_TAS = 0x00020000,
121 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
122 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
123 SCF_UNUSED = 0x00100000,
124 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
125 SCF_EMULATE_CDB_ASYNC = 0x01000000,
126 };
127
128 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
129 enum transport_lunflags_table {
130 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
131 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
132 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
133 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
134 };
135
136 /* struct se_device->dev_status */
137 enum transport_device_status_table {
138 TRANSPORT_DEVICE_ACTIVATED = 0x01,
139 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
140 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
141 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
142 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
143 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
144 };
145
146 /*
147 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
148 * to signal which ASC/ASCQ sense payload should be built.
149 */
150 enum tcm_sense_reason_table {
151 TCM_NON_EXISTENT_LUN = 0x01,
152 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
153 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
154 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
155 TCM_SERVICE_CRC_ERROR = 0x05,
156 TCM_SNACK_REJECTED = 0x06,
157 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
158 TCM_INVALID_CDB_FIELD = 0x08,
159 TCM_INVALID_PARAMETER_LIST = 0x09,
160 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
161 TCM_UNKNOWN_MODE_PAGE = 0x0b,
162 TCM_WRITE_PROTECTED = 0x0c,
163 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
164 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
165 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
166 };
167
168 struct se_obj {
169 atomic_t obj_access_count;
170 } ____cacheline_aligned;
171
172 /*
173 * Used by TCM Core internally to signal if ALUA emulation is enabled or
174 * disabled, or running in with TCM/pSCSI passthrough mode
175 */
176 typedef enum {
177 SPC_ALUA_PASSTHROUGH,
178 SPC2_ALUA_DISABLED,
179 SPC3_ALUA_EMULATED
180 } t10_alua_index_t;
181
182 /*
183 * Used by TCM Core internally to signal if SAM Task Attribute emulation
184 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
185 */
186 typedef enum {
187 SAM_TASK_ATTR_PASSTHROUGH,
188 SAM_TASK_ATTR_UNTAGGED,
189 SAM_TASK_ATTR_EMULATED
190 } t10_task_attr_index_t;
191
192 /*
193 * Used for target SCSI statistics
194 */
195 typedef enum {
196 SCSI_INST_INDEX,
197 SCSI_DEVICE_INDEX,
198 SCSI_AUTH_INTR_INDEX,
199 SCSI_INDEX_TYPE_MAX
200 } scsi_index_t;
201
202 struct se_cmd;
203
204 struct t10_alua {
205 t10_alua_index_t alua_type;
206 /* ALUA Target Port Group ID */
207 u16 alua_tg_pt_gps_counter;
208 u32 alua_tg_pt_gps_count;
209 spinlock_t tg_pt_gps_lock;
210 struct se_subsystem_dev *t10_sub_dev;
211 /* Used for default ALUA Target Port Group */
212 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
213 /* Used for default ALUA Target Port Group ConfigFS group */
214 struct config_group alua_tg_pt_gps_group;
215 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
216 struct list_head tg_pt_gps_list;
217 } ____cacheline_aligned;
218
219 struct t10_alua_lu_gp {
220 u16 lu_gp_id;
221 int lu_gp_valid_id;
222 u32 lu_gp_members;
223 atomic_t lu_gp_shutdown;
224 atomic_t lu_gp_ref_cnt;
225 spinlock_t lu_gp_lock;
226 struct config_group lu_gp_group;
227 struct list_head lu_gp_node;
228 struct list_head lu_gp_mem_list;
229 } ____cacheline_aligned;
230
231 struct t10_alua_lu_gp_member {
232 bool lu_gp_assoc;
233 atomic_t lu_gp_mem_ref_cnt;
234 spinlock_t lu_gp_mem_lock;
235 struct t10_alua_lu_gp *lu_gp;
236 struct se_device *lu_gp_mem_dev;
237 struct list_head lu_gp_mem_list;
238 } ____cacheline_aligned;
239
240 struct t10_alua_tg_pt_gp {
241 u16 tg_pt_gp_id;
242 int tg_pt_gp_valid_id;
243 int tg_pt_gp_alua_access_status;
244 int tg_pt_gp_alua_access_type;
245 int tg_pt_gp_nonop_delay_msecs;
246 int tg_pt_gp_trans_delay_msecs;
247 int tg_pt_gp_pref;
248 int tg_pt_gp_write_metadata;
249 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
250 #define ALUA_MD_BUF_LEN 1024
251 u32 tg_pt_gp_md_buf_len;
252 u32 tg_pt_gp_members;
253 atomic_t tg_pt_gp_alua_access_state;
254 atomic_t tg_pt_gp_ref_cnt;
255 spinlock_t tg_pt_gp_lock;
256 struct mutex tg_pt_gp_md_mutex;
257 struct se_subsystem_dev *tg_pt_gp_su_dev;
258 struct config_group tg_pt_gp_group;
259 struct list_head tg_pt_gp_list;
260 struct list_head tg_pt_gp_mem_list;
261 } ____cacheline_aligned;
262
263 struct t10_alua_tg_pt_gp_member {
264 bool tg_pt_gp_assoc;
265 atomic_t tg_pt_gp_mem_ref_cnt;
266 spinlock_t tg_pt_gp_mem_lock;
267 struct t10_alua_tg_pt_gp *tg_pt_gp;
268 struct se_port *tg_pt;
269 struct list_head tg_pt_gp_mem_list;
270 } ____cacheline_aligned;
271
272 struct t10_vpd {
273 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
274 int protocol_identifier_set;
275 u32 protocol_identifier;
276 u32 device_identifier_code_set;
277 u32 association;
278 u32 device_identifier_type;
279 struct list_head vpd_list;
280 } ____cacheline_aligned;
281
282 struct t10_wwn {
283 char vendor[8];
284 char model[16];
285 char revision[4];
286 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
287 spinlock_t t10_vpd_lock;
288 struct se_subsystem_dev *t10_sub_dev;
289 struct config_group t10_wwn_group;
290 struct list_head t10_vpd_list;
291 } ____cacheline_aligned;
292
293
294 /*
295 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
296 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
297 * mode
298 */
299 typedef enum {
300 SPC_PASSTHROUGH,
301 SPC2_RESERVATIONS,
302 SPC3_PERSISTENT_RESERVATIONS
303 } t10_reservations_index_t;
304
305 struct t10_pr_registration {
306 /* Used for fabrics that contain WWN+ISID */
307 #define PR_REG_ISID_LEN 16
308 /* PR_REG_ISID_LEN + ',i,0x' */
309 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
310 char pr_reg_isid[PR_REG_ISID_LEN];
311 /* Used during APTPL metadata reading */
312 #define PR_APTPL_MAX_IPORT_LEN 256
313 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
314 /* Used during APTPL metadata reading */
315 #define PR_APTPL_MAX_TPORT_LEN 256
316 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
317 /* For writing out live meta data */
318 unsigned char *pr_aptpl_buf;
319 u16 pr_aptpl_rpti;
320 u16 pr_reg_tpgt;
321 /* Reservation effects all target ports */
322 int pr_reg_all_tg_pt;
323 /* Activate Persistence across Target Power Loss */
324 int pr_reg_aptpl;
325 int pr_res_holder;
326 int pr_res_type;
327 int pr_res_scope;
328 /* Used for fabric initiator WWPNs using a ISID */
329 bool isid_present_at_reg;
330 u32 pr_res_mapped_lun;
331 u32 pr_aptpl_target_lun;
332 u32 pr_res_generation;
333 u64 pr_reg_bin_isid;
334 u64 pr_res_key;
335 atomic_t pr_res_holders;
336 struct se_node_acl *pr_reg_nacl;
337 struct se_dev_entry *pr_reg_deve;
338 struct se_lun *pr_reg_tg_pt_lun;
339 struct list_head pr_reg_list;
340 struct list_head pr_reg_abort_list;
341 struct list_head pr_reg_aptpl_list;
342 struct list_head pr_reg_atp_list;
343 struct list_head pr_reg_atp_mem_list;
344 } ____cacheline_aligned;
345
346 /*
347 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
348 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
349 * core_setup_reservations()
350 */
351 struct t10_reservation_ops {
352 int (*t10_reservation_check)(struct se_cmd *, u32 *);
353 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
354 int (*t10_pr_register)(struct se_cmd *);
355 int (*t10_pr_clear)(struct se_cmd *);
356 };
357
358 struct t10_reservation {
359 /* Reservation effects all target ports */
360 int pr_all_tg_pt;
361 /* Activate Persistence across Target Power Loss enabled
362 * for SCSI device */
363 int pr_aptpl_active;
364 /* Used by struct t10_reservation->pr_aptpl_buf_len */
365 #define PR_APTPL_BUF_LEN 8192
366 u32 pr_aptpl_buf_len;
367 u32 pr_generation;
368 t10_reservations_index_t res_type;
369 spinlock_t registration_lock;
370 spinlock_t aptpl_reg_lock;
371 /*
372 * This will always be set by one individual I_T Nexus.
373 * However with all_tg_pt=1, other I_T Nexus from the
374 * same initiator can access PR reg/res info on a different
375 * target port.
376 *
377 * There is also the 'All Registrants' case, where there is
378 * a single *pr_res_holder of the reservation, but all
379 * registrations are considered reservation holders.
380 */
381 struct se_node_acl *pr_res_holder;
382 struct list_head registration_list;
383 struct list_head aptpl_reg_list;
384 struct t10_reservation_ops pr_ops;
385 } ____cacheline_aligned;
386
387 struct se_queue_req {
388 int state;
389 struct se_cmd *cmd;
390 struct list_head qr_list;
391 } ____cacheline_aligned;
392
393 struct se_queue_obj {
394 atomic_t queue_cnt;
395 spinlock_t cmd_queue_lock;
396 struct list_head qobj_list;
397 wait_queue_head_t thread_wq;
398 } ____cacheline_aligned;
399
400 struct se_task {
401 unsigned long long task_lba;
402 u32 task_sectors;
403 u32 task_size;
404 struct se_cmd *task_se_cmd;
405 struct scatterlist *task_sg;
406 struct scatterlist *task_sg_bidi;
407 u32 task_sg_nents;
408 u16 task_flags;
409 u8 task_sense;
410 u8 task_scsi_status;
411 int task_error_status;
412 enum dma_data_direction task_data_direction;
413 atomic_t task_state_active;
414 struct timer_list task_timer;
415 struct list_head t_list;
416 struct list_head t_execute_list;
417 struct list_head t_state_list;
418 struct completion task_stop_comp;
419 } ____cacheline_aligned;
420
421 struct se_cmd {
422 /* SAM response code being sent to initiator */
423 u8 scsi_status;
424 u8 scsi_asc;
425 u8 scsi_ascq;
426 u8 scsi_sense_reason;
427 u16 scsi_sense_length;
428 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
429 int alua_nonop_delay;
430 /* See include/linux/dma-mapping.h */
431 enum dma_data_direction data_direction;
432 /* For SAM Task Attribute */
433 int sam_task_attr;
434 /* Transport protocol dependent state, see transport_state_table */
435 enum transport_state_table t_state;
436 /* Transport specific error status */
437 int transport_error_status;
438 /* See se_cmd_flags_table */
439 u32 se_cmd_flags;
440 u32 se_ordered_id;
441 /* Total size in bytes associated with command */
442 u32 data_length;
443 /* SCSI Presented Data Transfer Length */
444 u32 cmd_spdtl;
445 u32 residual_count;
446 u32 orig_fe_lun;
447 /* Persistent Reservation key */
448 u64 pr_res_key;
449 atomic_t transport_sent;
450 /* Used for sense data */
451 void *sense_buffer;
452 struct list_head se_delayed_node;
453 struct list_head se_ordered_node;
454 struct list_head se_lun_node;
455 struct list_head se_qf_node;
456 struct se_device *se_dev;
457 struct se_dev_entry *se_deve;
458 struct se_device *se_obj_ptr;
459 struct se_device *se_orig_obj_ptr;
460 struct se_lun *se_lun;
461 /* Only used for internal passthrough and legacy TCM fabric modules */
462 struct se_session *se_sess;
463 struct se_tmr_req *se_tmr_req;
464 struct list_head se_queue_node;
465 struct target_core_fabric_ops *se_tfo;
466 int (*transport_emulate_cdb)(struct se_cmd *);
467 void (*transport_complete_callback)(struct se_cmd *);
468
469 unsigned char *t_task_cdb;
470 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
471 unsigned long long t_task_lba;
472 int t_tasks_failed;
473 int t_tasks_fua;
474 bool t_tasks_bidi;
475 u32 t_tasks_sg_chained_no;
476 atomic_t t_fe_count;
477 atomic_t t_se_count;
478 atomic_t t_task_cdbs_left;
479 atomic_t t_task_cdbs_ex_left;
480 atomic_t t_task_cdbs_timeout_left;
481 atomic_t t_task_cdbs_sent;
482 atomic_t t_transport_aborted;
483 atomic_t t_transport_active;
484 atomic_t t_transport_complete;
485 atomic_t t_transport_queue_active;
486 atomic_t t_transport_sent;
487 atomic_t t_transport_stop;
488 atomic_t t_transport_timeout;
489 atomic_t transport_dev_active;
490 atomic_t transport_lun_active;
491 atomic_t transport_lun_fe_stop;
492 atomic_t transport_lun_stop;
493 spinlock_t t_state_lock;
494 struct completion t_transport_stop_comp;
495 struct completion transport_lun_fe_stop_comp;
496 struct completion transport_lun_stop_comp;
497 struct scatterlist *t_tasks_sg_chained;
498
499 /*
500 * Used for pre-registered fabric SGL passthrough WRITE and READ
501 * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
502 * and other HW target mode fabric modules.
503 */
504 struct scatterlist *t_task_pt_sgl;
505 u32 t_task_pt_sgl_num;
506
507 struct scatterlist *t_data_sg;
508 unsigned int t_data_nents;
509 struct scatterlist *t_bidi_data_sg;
510 unsigned int t_bidi_data_nents;
511
512 /* Used for BIDI READ */
513 struct list_head t_task_list;
514 u32 t_task_list_num;
515
516 } ____cacheline_aligned;
517
518 struct se_tmr_req {
519 /* Task Management function to be preformed */
520 u8 function;
521 /* Task Management response to send */
522 u8 response;
523 int call_transport;
524 /* Reference to ITT that Task Mgmt should be preformed */
525 u32 ref_task_tag;
526 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
527 u64 ref_task_lun;
528 void *fabric_tmr_ptr;
529 struct se_cmd *task_cmd;
530 struct se_cmd *ref_cmd;
531 struct se_device *tmr_dev;
532 struct se_lun *tmr_lun;
533 struct list_head tmr_list;
534 } ____cacheline_aligned;
535
536 struct se_ua {
537 u8 ua_asc;
538 u8 ua_ascq;
539 struct se_node_acl *ua_nacl;
540 struct list_head ua_dev_list;
541 struct list_head ua_nacl_list;
542 } ____cacheline_aligned;
543
544 struct se_node_acl {
545 char initiatorname[TRANSPORT_IQN_LEN];
546 /* Used to signal demo mode created ACL, disabled by default */
547 bool dynamic_node_acl;
548 u32 queue_depth;
549 u32 acl_index;
550 u64 num_cmds;
551 u64 read_bytes;
552 u64 write_bytes;
553 spinlock_t stats_lock;
554 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
555 atomic_t acl_pr_ref_count;
556 struct se_dev_entry *device_list;
557 struct se_session *nacl_sess;
558 struct se_portal_group *se_tpg;
559 spinlock_t device_list_lock;
560 spinlock_t nacl_sess_lock;
561 struct config_group acl_group;
562 struct config_group acl_attrib_group;
563 struct config_group acl_auth_group;
564 struct config_group acl_param_group;
565 struct config_group acl_fabric_stat_group;
566 struct config_group *acl_default_groups[5];
567 struct list_head acl_list;
568 struct list_head acl_sess_list;
569 } ____cacheline_aligned;
570
571 struct se_session {
572 u64 sess_bin_isid;
573 struct se_node_acl *se_node_acl;
574 struct se_portal_group *se_tpg;
575 void *fabric_sess_ptr;
576 struct list_head sess_list;
577 struct list_head sess_acl_list;
578 } ____cacheline_aligned;
579
580 struct se_device;
581 struct se_transform_info;
582 struct scatterlist;
583
584 struct se_ml_stat_grps {
585 struct config_group stat_group;
586 struct config_group scsi_auth_intr_group;
587 struct config_group scsi_att_intr_port_group;
588 };
589
590 struct se_lun_acl {
591 char initiatorname[TRANSPORT_IQN_LEN];
592 u32 mapped_lun;
593 struct se_node_acl *se_lun_nacl;
594 struct se_lun *se_lun;
595 struct list_head lacl_list;
596 struct config_group se_lun_group;
597 struct se_ml_stat_grps ml_stat_grps;
598 } ____cacheline_aligned;
599
600 struct se_dev_entry {
601 bool def_pr_registered;
602 /* See transport_lunflags_table */
603 u32 lun_flags;
604 u32 deve_cmds;
605 u32 mapped_lun;
606 u32 average_bytes;
607 u32 last_byte_count;
608 u32 total_cmds;
609 u32 total_bytes;
610 u64 pr_res_key;
611 u64 creation_time;
612 u32 attach_count;
613 u64 read_bytes;
614 u64 write_bytes;
615 atomic_t ua_count;
616 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
617 atomic_t pr_ref_count;
618 struct se_lun_acl *se_lun_acl;
619 spinlock_t ua_lock;
620 struct se_lun *se_lun;
621 struct list_head alua_port_list;
622 struct list_head ua_list;
623 } ____cacheline_aligned;
624
625 struct se_dev_limits {
626 /* Max supported HW queue depth */
627 u32 hw_queue_depth;
628 /* Max supported virtual queue depth */
629 u32 queue_depth;
630 /* From include/linux/blkdev.h for the other HW/SW limits. */
631 struct queue_limits limits;
632 } ____cacheline_aligned;
633
634 struct se_dev_attrib {
635 int emulate_dpo;
636 int emulate_fua_write;
637 int emulate_fua_read;
638 int emulate_write_cache;
639 int emulate_ua_intlck_ctrl;
640 int emulate_tas;
641 int emulate_tpu;
642 int emulate_tpws;
643 int emulate_reservations;
644 int emulate_alua;
645 int enforce_pr_isids;
646 int is_nonrot;
647 int emulate_rest_reord;
648 u32 hw_block_size;
649 u32 block_size;
650 u32 hw_max_sectors;
651 u32 max_sectors;
652 u32 optimal_sectors;
653 u32 hw_queue_depth;
654 u32 queue_depth;
655 u32 task_timeout;
656 u32 max_unmap_lba_count;
657 u32 max_unmap_block_desc_count;
658 u32 unmap_granularity;
659 u32 unmap_granularity_alignment;
660 struct se_subsystem_dev *da_sub_dev;
661 struct config_group da_group;
662 } ____cacheline_aligned;
663
664 struct se_dev_stat_grps {
665 struct config_group stat_group;
666 struct config_group scsi_dev_group;
667 struct config_group scsi_tgt_dev_group;
668 struct config_group scsi_lu_group;
669 };
670
671 struct se_subsystem_dev {
672 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
673 #define SE_DEV_ALIAS_LEN 512
674 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
675 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
676 #define SE_UDEV_PATH_LEN 512
677 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
678 u32 su_dev_flags;
679 struct se_hba *se_dev_hba;
680 struct se_device *se_dev_ptr;
681 struct se_dev_attrib se_dev_attrib;
682 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
683 struct t10_alua t10_alua;
684 /* T10 Inquiry and VPD WWN Information */
685 struct t10_wwn t10_wwn;
686 /* T10 SPC-2 + SPC-3 Reservations */
687 struct t10_reservation t10_pr;
688 spinlock_t se_dev_lock;
689 void *se_dev_su_ptr;
690 struct list_head se_dev_node;
691 struct config_group se_dev_group;
692 /* For T10 Reservations */
693 struct config_group se_dev_pr_group;
694 /* For target_core_stat.c groups */
695 struct se_dev_stat_grps dev_stat_grps;
696 } ____cacheline_aligned;
697
698 struct se_device {
699 /* Set to 1 if thread is NOT sleeping on thread_sem */
700 u8 thread_active;
701 u8 dev_status_timer_flags;
702 /* RELATIVE TARGET PORT IDENTIFER Counter */
703 u16 dev_rpti_counter;
704 /* Used for SAM Task Attribute ordering */
705 u32 dev_cur_ordered_id;
706 u32 dev_flags;
707 u32 dev_port_count;
708 /* See transport_device_status_table */
709 u32 dev_status;
710 u32 dev_tcq_window_closed;
711 /* Physical device queue depth */
712 u32 queue_depth;
713 /* Used for SPC-2 reservations enforce of ISIDs */
714 u64 dev_res_bin_isid;
715 t10_task_attr_index_t dev_task_attr_type;
716 /* Pointer to transport specific device structure */
717 void *dev_ptr;
718 u32 dev_index;
719 u64 creation_time;
720 u32 num_resets;
721 u64 num_cmds;
722 u64 read_bytes;
723 u64 write_bytes;
724 spinlock_t stats_lock;
725 /* Active commands on this virtual SE device */
726 atomic_t active_cmds;
727 atomic_t simple_cmds;
728 atomic_t depth_left;
729 atomic_t dev_ordered_id;
730 atomic_t dev_tur_active;
731 atomic_t execute_tasks;
732 atomic_t dev_status_thr_count;
733 atomic_t dev_hoq_count;
734 atomic_t dev_ordered_sync;
735 atomic_t dev_qf_count;
736 struct se_obj dev_obj;
737 struct se_obj dev_access_obj;
738 struct se_obj dev_export_obj;
739 struct se_queue_obj dev_queue_obj;
740 spinlock_t delayed_cmd_lock;
741 spinlock_t ordered_cmd_lock;
742 spinlock_t execute_task_lock;
743 spinlock_t state_task_lock;
744 spinlock_t dev_alua_lock;
745 spinlock_t dev_reservation_lock;
746 spinlock_t dev_state_lock;
747 spinlock_t dev_status_lock;
748 spinlock_t dev_status_thr_lock;
749 spinlock_t se_port_lock;
750 spinlock_t se_tmr_lock;
751 spinlock_t qf_cmd_lock;
752 /* Used for legacy SPC-2 reservationsa */
753 struct se_node_acl *dev_reserved_node_acl;
754 /* Used for ALUA Logical Unit Group membership */
755 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
756 /* Used for SPC-3 Persistent Reservations */
757 struct t10_pr_registration *dev_pr_res_holder;
758 struct list_head dev_sep_list;
759 struct list_head dev_tmr_list;
760 struct timer_list dev_status_timer;
761 /* Pointer to descriptor for processing thread */
762 struct task_struct *process_thread;
763 pid_t process_thread_pid;
764 struct task_struct *dev_mgmt_thread;
765 struct work_struct qf_work_queue;
766 struct list_head delayed_cmd_list;
767 struct list_head ordered_cmd_list;
768 struct list_head execute_task_list;
769 struct list_head state_task_list;
770 struct list_head qf_cmd_list;
771 /* Pointer to associated SE HBA */
772 struct se_hba *se_hba;
773 struct se_subsystem_dev *se_sub_dev;
774 /* Pointer to template of function pointers for transport */
775 struct se_subsystem_api *transport;
776 /* Linked list for struct se_hba struct se_device list */
777 struct list_head dev_list;
778 /* Linked list for struct se_global->g_se_dev_list */
779 struct list_head g_se_dev_list;
780 } ____cacheline_aligned;
781
782 struct se_hba {
783 u16 hba_tpgt;
784 u32 hba_id;
785 /* See hba_flags_table */
786 u32 hba_flags;
787 /* Virtual iSCSI devices attached. */
788 u32 dev_count;
789 u32 hba_index;
790 /* Pointer to transport specific host structure. */
791 void *hba_ptr;
792 /* Linked list for struct se_device */
793 struct list_head hba_dev_list;
794 struct list_head hba_node;
795 spinlock_t device_lock;
796 struct config_group hba_group;
797 struct mutex hba_access_mutex;
798 struct se_subsystem_api *transport;
799 } ____cacheline_aligned;
800
801 struct se_port_stat_grps {
802 struct config_group stat_group;
803 struct config_group scsi_port_group;
804 struct config_group scsi_tgt_port_group;
805 struct config_group scsi_transport_group;
806 };
807
808 struct se_lun {
809 /* See transport_lun_status_table */
810 enum transport_lun_status_table lun_status;
811 u32 lun_access;
812 u32 lun_flags;
813 u32 unpacked_lun;
814 atomic_t lun_acl_count;
815 spinlock_t lun_acl_lock;
816 spinlock_t lun_cmd_lock;
817 spinlock_t lun_sep_lock;
818 struct completion lun_shutdown_comp;
819 struct list_head lun_cmd_list;
820 struct list_head lun_acl_list;
821 struct se_device *lun_se_dev;
822 struct se_port *lun_sep;
823 struct config_group lun_group;
824 struct se_port_stat_grps port_stat_grps;
825 } ____cacheline_aligned;
826
827 struct scsi_port_stats {
828 u64 cmd_pdus;
829 u64 tx_data_octets;
830 u64 rx_data_octets;
831 } ____cacheline_aligned;
832
833 struct se_port {
834 /* RELATIVE TARGET PORT IDENTIFER */
835 u16 sep_rtpi;
836 int sep_tg_pt_secondary_stat;
837 int sep_tg_pt_secondary_write_md;
838 u32 sep_index;
839 struct scsi_port_stats sep_stats;
840 /* Used for ALUA Target Port Groups membership */
841 atomic_t sep_tg_pt_gp_active;
842 atomic_t sep_tg_pt_secondary_offline;
843 /* Used for PR ALL_TG_PT=1 */
844 atomic_t sep_tg_pt_ref_cnt;
845 spinlock_t sep_alua_lock;
846 struct mutex sep_tg_pt_md_mutex;
847 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
848 struct se_lun *sep_lun;
849 struct se_portal_group *sep_tpg;
850 struct list_head sep_alua_list;
851 struct list_head sep_list;
852 } ____cacheline_aligned;
853
854 struct se_tpg_np {
855 struct se_portal_group *tpg_np_parent;
856 struct config_group tpg_np_group;
857 } ____cacheline_aligned;
858
859 struct se_portal_group {
860 /* Type of target portal group, see transport_tpg_type_table */
861 enum transport_tpg_type_table se_tpg_type;
862 /* Number of ACLed Initiator Nodes for this TPG */
863 u32 num_node_acls;
864 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
865 atomic_t tpg_pr_ref_count;
866 /* Spinlock for adding/removing ACLed Nodes */
867 spinlock_t acl_node_lock;
868 /* Spinlock for adding/removing sessions */
869 spinlock_t session_lock;
870 spinlock_t tpg_lun_lock;
871 /* Pointer to $FABRIC_MOD portal group */
872 void *se_tpg_fabric_ptr;
873 struct list_head se_tpg_node;
874 /* linked list for initiator ACL list */
875 struct list_head acl_node_list;
876 struct se_lun *tpg_lun_list;
877 struct se_lun tpg_virt_lun0;
878 /* List of TCM sessions associated wth this TPG */
879 struct list_head tpg_sess_list;
880 /* Pointer to $FABRIC_MOD dependent code */
881 struct target_core_fabric_ops *se_tpg_tfo;
882 struct se_wwn *se_tpg_wwn;
883 struct config_group tpg_group;
884 struct config_group *tpg_default_groups[6];
885 struct config_group tpg_lun_group;
886 struct config_group tpg_np_group;
887 struct config_group tpg_acl_group;
888 struct config_group tpg_attrib_group;
889 struct config_group tpg_param_group;
890 } ____cacheline_aligned;
891
892 struct se_wwn {
893 struct target_fabric_configfs *wwn_tf;
894 struct config_group wwn_group;
895 struct config_group *wwn_default_groups[2];
896 struct config_group fabric_stat_group;
897 } ____cacheline_aligned;
898
899 #endif /* TARGET_CORE_BASE_H */
Linux kernel - Deliverables
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