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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[zen-stable.git] / include / target / target_core_base.h
blob6873c7dd9145d2a23f682d9e8d2c695a7571d656
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_FUA = 0x00000200,
107 SCF_SE_LUN_CMD = 0x00000800,
108 SCF_SE_ALLOW_EOO = 0x00001000,
109 SCF_BIDI = 0x00002000,
110 SCF_SENT_CHECK_CONDITION = 0x00004000,
111 SCF_OVERFLOW_BIT = 0x00008000,
112 SCF_UNDERFLOW_BIT = 0x00010000,
113 SCF_SENT_DELAYED_TAS = 0x00020000,
114 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
115 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
116 SCF_UNUSED = 0x00100000,
117 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
118 };
119
120 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
121 enum transport_lunflags_table {
122 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
123 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
124 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
125 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
126 };
127
128 /* struct se_device->dev_status */
129 enum transport_device_status_table {
130 TRANSPORT_DEVICE_ACTIVATED = 0x01,
131 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
132 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
133 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
134 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
135 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
136 };
137
138 /*
139 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
140 * to signal which ASC/ASCQ sense payload should be built.
141 */
142 enum tcm_sense_reason_table {
143 TCM_NON_EXISTENT_LUN = 0x01,
144 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
145 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
146 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
147 TCM_SERVICE_CRC_ERROR = 0x05,
148 TCM_SNACK_REJECTED = 0x06,
149 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
150 TCM_INVALID_CDB_FIELD = 0x08,
151 TCM_INVALID_PARAMETER_LIST = 0x09,
152 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
153 TCM_UNKNOWN_MODE_PAGE = 0x0b,
154 TCM_WRITE_PROTECTED = 0x0c,
155 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
156 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
157 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
158 TCM_RESERVATION_CONFLICT = 0x10,
159 };
160
161 struct se_obj {
162 atomic_t obj_access_count;
163 } ____cacheline_aligned;
164
165 /*
166 * Used by TCM Core internally to signal if ALUA emulation is enabled or
167 * disabled, or running in with TCM/pSCSI passthrough mode
168 */
169 typedef enum {
170 SPC_ALUA_PASSTHROUGH,
171 SPC2_ALUA_DISABLED,
172 SPC3_ALUA_EMULATED
173 } t10_alua_index_t;
174
175 /*
176 * Used by TCM Core internally to signal if SAM Task Attribute emulation
177 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
178 */
179 typedef enum {
180 SAM_TASK_ATTR_PASSTHROUGH,
181 SAM_TASK_ATTR_UNTAGGED,
182 SAM_TASK_ATTR_EMULATED
183 } t10_task_attr_index_t;
184
185 /*
186 * Used for target SCSI statistics
187 */
188 typedef enum {
189 SCSI_INST_INDEX,
190 SCSI_DEVICE_INDEX,
191 SCSI_AUTH_INTR_INDEX,
192 SCSI_INDEX_TYPE_MAX
193 } scsi_index_t;
194
195 struct se_cmd;
196
197 struct t10_alua {
198 t10_alua_index_t alua_type;
199 /* ALUA Target Port Group ID */
200 u16 alua_tg_pt_gps_counter;
201 u32 alua_tg_pt_gps_count;
202 spinlock_t tg_pt_gps_lock;
203 struct se_subsystem_dev *t10_sub_dev;
204 /* Used for default ALUA Target Port Group */
205 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
206 /* Used for default ALUA Target Port Group ConfigFS group */
207 struct config_group alua_tg_pt_gps_group;
208 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
209 struct list_head tg_pt_gps_list;
210 } ____cacheline_aligned;
211
212 struct t10_alua_lu_gp {
213 u16 lu_gp_id;
214 int lu_gp_valid_id;
215 u32 lu_gp_members;
216 atomic_t lu_gp_ref_cnt;
217 spinlock_t lu_gp_lock;
218 struct config_group lu_gp_group;
219 struct list_head lu_gp_node;
220 struct list_head lu_gp_mem_list;
221 } ____cacheline_aligned;
222
223 struct t10_alua_lu_gp_member {
224 bool lu_gp_assoc;
225 atomic_t lu_gp_mem_ref_cnt;
226 spinlock_t lu_gp_mem_lock;
227 struct t10_alua_lu_gp *lu_gp;
228 struct se_device *lu_gp_mem_dev;
229 struct list_head lu_gp_mem_list;
230 } ____cacheline_aligned;
231
232 struct t10_alua_tg_pt_gp {
233 u16 tg_pt_gp_id;
234 int tg_pt_gp_valid_id;
235 int tg_pt_gp_alua_access_status;
236 int tg_pt_gp_alua_access_type;
237 int tg_pt_gp_nonop_delay_msecs;
238 int tg_pt_gp_trans_delay_msecs;
239 int tg_pt_gp_pref;
240 int tg_pt_gp_write_metadata;
241 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
242 #define ALUA_MD_BUF_LEN 1024
243 u32 tg_pt_gp_md_buf_len;
244 u32 tg_pt_gp_members;
245 atomic_t tg_pt_gp_alua_access_state;
246 atomic_t tg_pt_gp_ref_cnt;
247 spinlock_t tg_pt_gp_lock;
248 struct mutex tg_pt_gp_md_mutex;
249 struct se_subsystem_dev *tg_pt_gp_su_dev;
250 struct config_group tg_pt_gp_group;
251 struct list_head tg_pt_gp_list;
252 struct list_head tg_pt_gp_mem_list;
253 } ____cacheline_aligned;
254
255 struct t10_alua_tg_pt_gp_member {
256 bool tg_pt_gp_assoc;
257 atomic_t tg_pt_gp_mem_ref_cnt;
258 spinlock_t tg_pt_gp_mem_lock;
259 struct t10_alua_tg_pt_gp *tg_pt_gp;
260 struct se_port *tg_pt;
261 struct list_head tg_pt_gp_mem_list;
262 } ____cacheline_aligned;
263
264 struct t10_vpd {
265 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
266 int protocol_identifier_set;
267 u32 protocol_identifier;
268 u32 device_identifier_code_set;
269 u32 association;
270 u32 device_identifier_type;
271 struct list_head vpd_list;
272 } ____cacheline_aligned;
273
274 struct t10_wwn {
275 char vendor[8];
276 char model[16];
277 char revision[4];
278 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
279 spinlock_t t10_vpd_lock;
280 struct se_subsystem_dev *t10_sub_dev;
281 struct config_group t10_wwn_group;
282 struct list_head t10_vpd_list;
283 } ____cacheline_aligned;
284
285
286 /*
287 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
288 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
289 * mode
290 */
291 typedef enum {
292 SPC_PASSTHROUGH,
293 SPC2_RESERVATIONS,
294 SPC3_PERSISTENT_RESERVATIONS
295 } t10_reservations_index_t;
296
297 struct t10_pr_registration {
298 /* Used for fabrics that contain WWN+ISID */
299 #define PR_REG_ISID_LEN 16
300 /* PR_REG_ISID_LEN + ',i,0x' */
301 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
302 char pr_reg_isid[PR_REG_ISID_LEN];
303 /* Used during APTPL metadata reading */
304 #define PR_APTPL_MAX_IPORT_LEN 256
305 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
306 /* Used during APTPL metadata reading */
307 #define PR_APTPL_MAX_TPORT_LEN 256
308 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
309 /* For writing out live meta data */
310 unsigned char *pr_aptpl_buf;
311 u16 pr_aptpl_rpti;
312 u16 pr_reg_tpgt;
313 /* Reservation effects all target ports */
314 int pr_reg_all_tg_pt;
315 /* Activate Persistence across Target Power Loss */
316 int pr_reg_aptpl;
317 int pr_res_holder;
318 int pr_res_type;
319 int pr_res_scope;
320 /* Used for fabric initiator WWPNs using a ISID */
321 bool isid_present_at_reg;
322 u32 pr_res_mapped_lun;
323 u32 pr_aptpl_target_lun;
324 u32 pr_res_generation;
325 u64 pr_reg_bin_isid;
326 u64 pr_res_key;
327 atomic_t pr_res_holders;
328 struct se_node_acl *pr_reg_nacl;
329 struct se_dev_entry *pr_reg_deve;
330 struct se_lun *pr_reg_tg_pt_lun;
331 struct list_head pr_reg_list;
332 struct list_head pr_reg_abort_list;
333 struct list_head pr_reg_aptpl_list;
334 struct list_head pr_reg_atp_list;
335 struct list_head pr_reg_atp_mem_list;
336 } ____cacheline_aligned;
337
338 /*
339 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
340 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
341 * core_setup_reservations()
342 */
343 struct t10_reservation_ops {
344 int (*t10_reservation_check)(struct se_cmd *, u32 *);
345 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
346 int (*t10_pr_register)(struct se_cmd *);
347 int (*t10_pr_clear)(struct se_cmd *);
348 };
349
350 struct t10_reservation {
351 /* Reservation effects all target ports */
352 int pr_all_tg_pt;
353 /* Activate Persistence across Target Power Loss enabled
354 * for SCSI device */
355 int pr_aptpl_active;
356 /* Used by struct t10_reservation->pr_aptpl_buf_len */
357 #define PR_APTPL_BUF_LEN 8192
358 u32 pr_aptpl_buf_len;
359 u32 pr_generation;
360 t10_reservations_index_t res_type;
361 spinlock_t registration_lock;
362 spinlock_t aptpl_reg_lock;
363 /*
364 * This will always be set by one individual I_T Nexus.
365 * However with all_tg_pt=1, other I_T Nexus from the
366 * same initiator can access PR reg/res info on a different
367 * target port.
368 *
369 * There is also the 'All Registrants' case, where there is
370 * a single *pr_res_holder of the reservation, but all
371 * registrations are considered reservation holders.
372 */
373 struct se_node_acl *pr_res_holder;
374 struct list_head registration_list;
375 struct list_head aptpl_reg_list;
376 struct t10_reservation_ops pr_ops;
377 } ____cacheline_aligned;
378
379 struct se_queue_req {
380 int state;
381 struct se_cmd *cmd;
382 struct list_head qr_list;
383 } ____cacheline_aligned;
384
385 struct se_queue_obj {
386 atomic_t queue_cnt;
387 spinlock_t cmd_queue_lock;
388 struct list_head qobj_list;
389 wait_queue_head_t thread_wq;
390 } ____cacheline_aligned;
391
392 struct se_task {
393 unsigned long long task_lba;
394 u32 task_sectors;
395 u32 task_size;
396 struct se_cmd *task_se_cmd;
397 struct scatterlist *task_sg;
398 u32 task_sg_nents;
399 u16 task_flags;
400 u8 task_sense;
401 u8 task_scsi_status;
402 int task_error_status;
403 enum dma_data_direction task_data_direction;
404 atomic_t task_state_active;
405 struct list_head t_list;
406 struct list_head t_execute_list;
407 struct list_head t_state_list;
408 struct completion task_stop_comp;
409 } ____cacheline_aligned;
410
411 struct se_cmd {
412 /* SAM response code being sent to initiator */
413 u8 scsi_status;
414 u8 scsi_asc;
415 u8 scsi_ascq;
416 u8 scsi_sense_reason;
417 u16 scsi_sense_length;
418 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
419 int alua_nonop_delay;
420 /* See include/linux/dma-mapping.h */
421 enum dma_data_direction data_direction;
422 /* For SAM Task Attribute */
423 int sam_task_attr;
424 /* Transport protocol dependent state, see transport_state_table */
425 enum transport_state_table t_state;
426 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
427 unsigned check_release:1;
428 unsigned cmd_wait_set:1;
429 /* See se_cmd_flags_table */
430 u32 se_cmd_flags;
431 u32 se_ordered_id;
432 /* Total size in bytes associated with command */
433 u32 data_length;
434 /* SCSI Presented Data Transfer Length */
435 u32 cmd_spdtl;
436 u32 residual_count;
437 u32 orig_fe_lun;
438 /* Persistent Reservation key */
439 u64 pr_res_key;
440 /* Used for sense data */
441 void *sense_buffer;
442 struct list_head se_delayed_node;
443 struct list_head se_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_lun *se_lun;
448 /* Only used for internal passthrough and legacy TCM fabric modules */
449 struct se_session *se_sess;
450 struct se_tmr_req *se_tmr_req;
451 struct list_head se_queue_node;
452 struct list_head se_cmd_list;
453 struct completion cmd_wait_comp;
454 struct target_core_fabric_ops *se_tfo;
455 int (*execute_task)(struct se_task *);
456 void (*transport_complete_callback)(struct se_cmd *);
457
458 unsigned char *t_task_cdb;
459 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
460 unsigned long long t_task_lba;
461 int t_tasks_failed;
462 u32 t_tasks_sg_chained_no;
463 atomic_t t_fe_count;
464 atomic_t t_se_count;
465 atomic_t t_task_cdbs_left;
466 atomic_t t_task_cdbs_ex_left;
467 atomic_t t_task_cdbs_sent;
468 atomic_t t_transport_aborted;
469 atomic_t t_transport_active;
470 atomic_t t_transport_complete;
471 atomic_t t_transport_queue_active;
472 atomic_t t_transport_sent;
473 atomic_t t_transport_stop;
474 atomic_t transport_dev_active;
475 atomic_t transport_lun_active;
476 atomic_t transport_lun_fe_stop;
477 atomic_t transport_lun_stop;
478 spinlock_t t_state_lock;
479 struct completion t_transport_stop_comp;
480 struct completion transport_lun_fe_stop_comp;
481 struct completion transport_lun_stop_comp;
482 struct scatterlist *t_tasks_sg_chained;
483
484 struct work_struct work;
485
486 struct scatterlist *t_data_sg;
487 unsigned int t_data_nents;
488 struct scatterlist *t_bidi_data_sg;
489 unsigned int t_bidi_data_nents;
490
491 /* Used for BIDI READ */
492 struct list_head t_task_list;
493 u32 t_task_list_num;
494
495 } ____cacheline_aligned;
496
497 struct se_tmr_req {
498 /* Task Management function to be preformed */
499 u8 function;
500 /* Task Management response to send */
501 u8 response;
502 int call_transport;
503 /* Reference to ITT that Task Mgmt should be preformed */
504 u32 ref_task_tag;
505 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
506 u64 ref_task_lun;
507 void *fabric_tmr_ptr;
508 struct se_cmd *task_cmd;
509 struct se_cmd *ref_cmd;
510 struct se_device *tmr_dev;
511 struct se_lun *tmr_lun;
512 struct list_head tmr_list;
513 } ____cacheline_aligned;
514
515 struct se_ua {
516 u8 ua_asc;
517 u8 ua_ascq;
518 struct se_node_acl *ua_nacl;
519 struct list_head ua_dev_list;
520 struct list_head ua_nacl_list;
521 } ____cacheline_aligned;
522
523 struct se_node_acl {
524 char initiatorname[TRANSPORT_IQN_LEN];
525 /* Used to signal demo mode created ACL, disabled by default */
526 bool dynamic_node_acl;
527 u32 queue_depth;
528 u32 acl_index;
529 u64 num_cmds;
530 u64 read_bytes;
531 u64 write_bytes;
532 spinlock_t stats_lock;
533 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
534 atomic_t acl_pr_ref_count;
535 struct se_dev_entry *device_list;
536 struct se_session *nacl_sess;
537 struct se_portal_group *se_tpg;
538 spinlock_t device_list_lock;
539 spinlock_t nacl_sess_lock;
540 struct config_group acl_group;
541 struct config_group acl_attrib_group;
542 struct config_group acl_auth_group;
543 struct config_group acl_param_group;
544 struct config_group acl_fabric_stat_group;
545 struct config_group *acl_default_groups[5];
546 struct list_head acl_list;
547 struct list_head acl_sess_list;
548 } ____cacheline_aligned;
549
550 struct se_session {
551 unsigned sess_tearing_down:1;
552 u64 sess_bin_isid;
553 struct se_node_acl *se_node_acl;
554 struct se_portal_group *se_tpg;
555 void *fabric_sess_ptr;
556 struct list_head sess_list;
557 struct list_head sess_acl_list;
558 struct list_head sess_cmd_list;
559 struct list_head sess_wait_list;
560 spinlock_t sess_cmd_lock;
561 } ____cacheline_aligned;
562
563 struct se_device;
564 struct se_transform_info;
565 struct scatterlist;
566
567 struct se_ml_stat_grps {
568 struct config_group stat_group;
569 struct config_group scsi_auth_intr_group;
570 struct config_group scsi_att_intr_port_group;
571 };
572
573 struct se_lun_acl {
574 char initiatorname[TRANSPORT_IQN_LEN];
575 u32 mapped_lun;
576 struct se_node_acl *se_lun_nacl;
577 struct se_lun *se_lun;
578 struct list_head lacl_list;
579 struct config_group se_lun_group;
580 struct se_ml_stat_grps ml_stat_grps;
581 } ____cacheline_aligned;
582
583 struct se_dev_entry {
584 bool def_pr_registered;
585 /* See transport_lunflags_table */
586 u32 lun_flags;
587 u32 deve_cmds;
588 u32 mapped_lun;
589 u32 average_bytes;
590 u32 last_byte_count;
591 u32 total_cmds;
592 u32 total_bytes;
593 u64 pr_res_key;
594 u64 creation_time;
595 u32 attach_count;
596 u64 read_bytes;
597 u64 write_bytes;
598 atomic_t ua_count;
599 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
600 atomic_t pr_ref_count;
601 struct se_lun_acl *se_lun_acl;
602 spinlock_t ua_lock;
603 struct se_lun *se_lun;
604 struct list_head alua_port_list;
605 struct list_head ua_list;
606 } ____cacheline_aligned;
607
608 struct se_dev_limits {
609 /* Max supported HW queue depth */
610 u32 hw_queue_depth;
611 /* Max supported virtual queue depth */
612 u32 queue_depth;
613 /* From include/linux/blkdev.h for the other HW/SW limits. */
614 struct queue_limits limits;
615 } ____cacheline_aligned;
616
617 struct se_dev_attrib {
618 int emulate_dpo;
619 int emulate_fua_write;
620 int emulate_fua_read;
621 int emulate_write_cache;
622 int emulate_ua_intlck_ctrl;
623 int emulate_tas;
624 int emulate_tpu;
625 int emulate_tpws;
626 int emulate_reservations;
627 int emulate_alua;
628 int enforce_pr_isids;
629 int is_nonrot;
630 int emulate_rest_reord;
631 u32 hw_block_size;
632 u32 block_size;
633 u32 hw_max_sectors;
634 u32 max_sectors;
635 u32 optimal_sectors;
636 u32 hw_queue_depth;
637 u32 queue_depth;
638 u32 max_unmap_lba_count;
639 u32 max_unmap_block_desc_count;
640 u32 unmap_granularity;
641 u32 unmap_granularity_alignment;
642 struct se_subsystem_dev *da_sub_dev;
643 struct config_group da_group;
644 } ____cacheline_aligned;
645
646 struct se_dev_stat_grps {
647 struct config_group stat_group;
648 struct config_group scsi_dev_group;
649 struct config_group scsi_tgt_dev_group;
650 struct config_group scsi_lu_group;
651 };
652
653 struct se_subsystem_dev {
654 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
655 #define SE_DEV_ALIAS_LEN 512
656 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
657 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
658 #define SE_UDEV_PATH_LEN 512
659 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
660 u32 su_dev_flags;
661 struct se_hba *se_dev_hba;
662 struct se_device *se_dev_ptr;
663 struct se_dev_attrib se_dev_attrib;
664 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
665 struct t10_alua t10_alua;
666 /* T10 Inquiry and VPD WWN Information */
667 struct t10_wwn t10_wwn;
668 /* T10 SPC-2 + SPC-3 Reservations */
669 struct t10_reservation t10_pr;
670 spinlock_t se_dev_lock;
671 void *se_dev_su_ptr;
672 struct config_group se_dev_group;
673 /* For T10 Reservations */
674 struct config_group se_dev_pr_group;
675 /* For target_core_stat.c groups */
676 struct se_dev_stat_grps dev_stat_grps;
677 } ____cacheline_aligned;
678
679 struct se_device {
680 /* RELATIVE TARGET PORT IDENTIFER Counter */
681 u16 dev_rpti_counter;
682 /* Used for SAM Task Attribute ordering */
683 u32 dev_cur_ordered_id;
684 u32 dev_flags;
685 u32 dev_port_count;
686 /* See transport_device_status_table */
687 u32 dev_status;
688 u32 dev_tcq_window_closed;
689 /* Physical device queue depth */
690 u32 queue_depth;
691 /* Used for SPC-2 reservations enforce of ISIDs */
692 u64 dev_res_bin_isid;
693 t10_task_attr_index_t dev_task_attr_type;
694 /* Pointer to transport specific device structure */
695 void *dev_ptr;
696 u32 dev_index;
697 u64 creation_time;
698 u32 num_resets;
699 u64 num_cmds;
700 u64 read_bytes;
701 u64 write_bytes;
702 spinlock_t stats_lock;
703 /* Active commands on this virtual SE device */
704 atomic_t simple_cmds;
705 atomic_t depth_left;
706 atomic_t dev_ordered_id;
707 atomic_t execute_tasks;
708 atomic_t dev_ordered_sync;
709 atomic_t dev_qf_count;
710 struct se_obj dev_obj;
711 struct se_obj dev_access_obj;
712 struct se_obj dev_export_obj;
713 struct se_queue_obj dev_queue_obj;
714 spinlock_t delayed_cmd_lock;
715 spinlock_t execute_task_lock;
716 spinlock_t dev_reservation_lock;
717 spinlock_t dev_status_lock;
718 spinlock_t se_port_lock;
719 spinlock_t se_tmr_lock;
720 spinlock_t qf_cmd_lock;
721 /* Used for legacy SPC-2 reservationsa */
722 struct se_node_acl *dev_reserved_node_acl;
723 /* Used for ALUA Logical Unit Group membership */
724 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
725 /* Used for SPC-3 Persistent Reservations */
726 struct t10_pr_registration *dev_pr_res_holder;
727 struct list_head dev_sep_list;
728 struct list_head dev_tmr_list;
729 /* Pointer to descriptor for processing thread */
730 struct task_struct *process_thread;
731 struct work_struct qf_work_queue;
732 struct list_head delayed_cmd_list;
733 struct list_head execute_task_list;
734 struct list_head state_task_list;
735 struct list_head qf_cmd_list;
736 /* Pointer to associated SE HBA */
737 struct se_hba *se_hba;
738 struct se_subsystem_dev *se_sub_dev;
739 /* Pointer to template of function pointers for transport */
740 struct se_subsystem_api *transport;
741 /* Linked list for struct se_hba struct se_device list */
742 struct list_head dev_list;
743 } ____cacheline_aligned;
744
745 struct se_hba {
746 u16 hba_tpgt;
747 u32 hba_id;
748 /* See hba_flags_table */
749 u32 hba_flags;
750 /* Virtual iSCSI devices attached. */
751 u32 dev_count;
752 u32 hba_index;
753 /* Pointer to transport specific host structure. */
754 void *hba_ptr;
755 /* Linked list for struct se_device */
756 struct list_head hba_dev_list;
757 struct list_head hba_node;
758 spinlock_t device_lock;
759 struct config_group hba_group;
760 struct mutex hba_access_mutex;
761 struct se_subsystem_api *transport;
762 } ____cacheline_aligned;
763
764 struct se_port_stat_grps {
765 struct config_group stat_group;
766 struct config_group scsi_port_group;
767 struct config_group scsi_tgt_port_group;
768 struct config_group scsi_transport_group;
769 };
770
771 struct se_lun {
772 /* See transport_lun_status_table */
773 enum transport_lun_status_table lun_status;
774 u32 lun_access;
775 u32 lun_flags;
776 u32 unpacked_lun;
777 atomic_t lun_acl_count;
778 spinlock_t lun_acl_lock;
779 spinlock_t lun_cmd_lock;
780 spinlock_t lun_sep_lock;
781 struct completion lun_shutdown_comp;
782 struct list_head lun_cmd_list;
783 struct list_head lun_acl_list;
784 struct se_device *lun_se_dev;
785 struct se_port *lun_sep;
786 struct config_group lun_group;
787 struct se_port_stat_grps port_stat_grps;
788 } ____cacheline_aligned;
789
790 struct scsi_port_stats {
791 u64 cmd_pdus;
792 u64 tx_data_octets;
793 u64 rx_data_octets;
794 } ____cacheline_aligned;
795
796 struct se_port {
797 /* RELATIVE TARGET PORT IDENTIFER */
798 u16 sep_rtpi;
799 int sep_tg_pt_secondary_stat;
800 int sep_tg_pt_secondary_write_md;
801 u32 sep_index;
802 struct scsi_port_stats sep_stats;
803 /* Used for ALUA Target Port Groups membership */
804 atomic_t sep_tg_pt_secondary_offline;
805 /* Used for PR ALL_TG_PT=1 */
806 atomic_t sep_tg_pt_ref_cnt;
807 spinlock_t sep_alua_lock;
808 struct mutex sep_tg_pt_md_mutex;
809 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
810 struct se_lun *sep_lun;
811 struct se_portal_group *sep_tpg;
812 struct list_head sep_alua_list;
813 struct list_head sep_list;
814 } ____cacheline_aligned;
815
816 struct se_tpg_np {
817 struct se_portal_group *tpg_np_parent;
818 struct config_group tpg_np_group;
819 } ____cacheline_aligned;
820
821 struct se_portal_group {
822 /* Type of target portal group, see transport_tpg_type_table */
823 enum transport_tpg_type_table se_tpg_type;
824 /* Number of ACLed Initiator Nodes for this TPG */
825 u32 num_node_acls;
826 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
827 atomic_t tpg_pr_ref_count;
828 /* Spinlock for adding/removing ACLed Nodes */
829 spinlock_t acl_node_lock;
830 /* Spinlock for adding/removing sessions */
831 spinlock_t session_lock;
832 spinlock_t tpg_lun_lock;
833 /* Pointer to $FABRIC_MOD portal group */
834 void *se_tpg_fabric_ptr;
835 struct list_head se_tpg_node;
836 /* linked list for initiator ACL list */
837 struct list_head acl_node_list;
838 struct se_lun *tpg_lun_list;
839 struct se_lun tpg_virt_lun0;
840 /* List of TCM sessions associated wth this TPG */
841 struct list_head tpg_sess_list;
842 /* Pointer to $FABRIC_MOD dependent code */
843 struct target_core_fabric_ops *se_tpg_tfo;
844 struct se_wwn *se_tpg_wwn;
845 struct config_group tpg_group;
846 struct config_group *tpg_default_groups[6];
847 struct config_group tpg_lun_group;
848 struct config_group tpg_np_group;
849 struct config_group tpg_acl_group;
850 struct config_group tpg_attrib_group;
851 struct config_group tpg_param_group;
852 } ____cacheline_aligned;
853
854 struct se_wwn {
855 struct target_fabric_configfs *wwn_tf;
856 struct config_group wwn_group;
857 struct config_group *wwn_default_groups[2];
858 struct config_group fabric_stat_group;
859 } ____cacheline_aligned;
860
861 #endif /* TARGET_CORE_BASE_H */