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target: remove transport_generic_handle_cdb_map
[linux-2.6.git] / include / target / target_core_base.h
blob11052b24ee41d09f6458ae7e236e5c07126b5036
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-rc2-ml"
13 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
14
15 /* Maximum Number of LUNs per Target Portal Group */
16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
17 #define TRANSPORT_MAX_LUNS_PER_TPG 256
18 /*
19 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
20 *
21 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
22 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
23 * 16-byte CDBs by default and require an extra allocation for
24 * 32-byte CDBs to because of legacy issues.
25 *
26 * Within TCM Core there are no such legacy limitiations, so we go ahead
27 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
28 * within all TCM Core and subsystem plugin code.
29 */
30 #define TCM_MAX_COMMAND_SIZE 32
31 /*
32 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
33 * defined 96, but the real limit is 252 (or 260 including the header)
34 */
35 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
36 /* Used by transport_send_check_condition_and_sense() */
37 #define SPC_SENSE_KEY_OFFSET 2
38 #define SPC_ADD_SENSE_LEN_OFFSET 7
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 /* Attempts before moving from SHORT to LONG */
59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
62
63 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
64
65 /*
66 * struct se_subsystem_dev->su_dev_flags
67 */
68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
69 #define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
70 #define SDF_USING_UDEV_PATH 0x00000004
71 #define SDF_USING_ALIAS 0x00000008
72
73 /*
74 * struct se_device->dev_flags
75 */
76 #define DF_SPC2_RESERVATIONS 0x00000001
77 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
78
79 /* struct se_dev_attrib sanity values */
80 /* Default max_unmap_lba_count */
81 #define DA_MAX_UNMAP_LBA_COUNT 0
82 /* Default max_unmap_block_desc_count */
83 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
84 /* Default unmap_granularity */
85 #define DA_UNMAP_GRANULARITY_DEFAULT 0
86 /* Default unmap_granularity_alignment */
87 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
88 /* Default max transfer length */
89 #define DA_FABRIC_MAX_SECTORS 8192
90 /* Emulation for Direct Page Out */
91 #define DA_EMULATE_DPO 0
92 /* Emulation for Forced Unit Access WRITEs */
93 #define DA_EMULATE_FUA_WRITE 1
94 /* Emulation for Forced Unit Access READs */
95 #define DA_EMULATE_FUA_READ 0
96 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
97 #define DA_EMULATE_WRITE_CACHE 0
98 /* Emulation for UNIT ATTENTION Interlock Control */
99 #define DA_EMULATE_UA_INTLLCK_CTRL 0
100 /* Emulation for TASK_ABORTED status (TAS) by default */
101 #define DA_EMULATE_TAS 1
102 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
103 #define DA_EMULATE_TPU 0
104 /*
105 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
106 * block/blk-lib.c:blkdev_issue_discard()
107 */
108 #define DA_EMULATE_TPWS 0
109 /* No Emulation for PSCSI by default */
110 #define DA_EMULATE_RESERVATIONS 0
111 /* No Emulation for PSCSI by default */
112 #define DA_EMULATE_ALUA 0
113 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
114 #define DA_ENFORCE_PR_ISIDS 1
115 #define DA_STATUS_MAX_SECTORS_MIN 16
116 #define DA_STATUS_MAX_SECTORS_MAX 8192
117 /* By default don't report non-rotating (solid state) medium */
118 #define DA_IS_NONROT 0
119 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
120 #define DA_EMULATE_REST_REORD 0
121
122 #define SE_INQUIRY_BUF 512
123 #define SE_MODE_PAGE_BUF 512
124
125 /* struct se_hba->hba_flags */
126 enum hba_flags_table {
127 HBA_FLAGS_INTERNAL_USE = 0x01,
128 HBA_FLAGS_PSCSI_MODE = 0x02,
129 };
130
131 /* struct se_lun->lun_status */
132 enum transport_lun_status_table {
133 TRANSPORT_LUN_STATUS_FREE = 0,
134 TRANSPORT_LUN_STATUS_ACTIVE = 1,
135 };
136
137 /* struct se_portal_group->se_tpg_type */
138 enum transport_tpg_type_table {
139 TRANSPORT_TPG_TYPE_NORMAL = 0,
140 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
141 };
142
143 /* Special transport agnostic struct se_cmd->t_states */
144 enum transport_state_table {
145 TRANSPORT_NO_STATE = 0,
146 TRANSPORT_NEW_CMD = 1,
147 TRANSPORT_WRITE_PENDING = 3,
148 TRANSPORT_PROCESSING = 5,
149 TRANSPORT_COMPLETE = 6,
150 TRANSPORT_PROCESS_TMR = 9,
151 TRANSPORT_ISTATE_PROCESSING = 11,
152 TRANSPORT_COMPLETE_QF_WP = 18,
153 TRANSPORT_COMPLETE_QF_OK = 19,
154 };
155
156 /* Used for struct se_cmd->se_cmd_flags */
157 enum se_cmd_flags_table {
158 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
159 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
160 SCF_EMULATED_TASK_SENSE = 0x00000004,
161 SCF_SCSI_DATA_CDB = 0x00000008,
162 SCF_SCSI_TMR_CDB = 0x00000010,
163 SCF_SCSI_CDB_EXCEPTION = 0x00000020,
164 SCF_SCSI_RESERVATION_CONFLICT = 0x00000040,
165 SCF_FUA = 0x00000080,
166 SCF_SE_LUN_CMD = 0x00000100,
167 SCF_BIDI = 0x00000400,
168 SCF_SENT_CHECK_CONDITION = 0x00000800,
169 SCF_OVERFLOW_BIT = 0x00001000,
170 SCF_UNDERFLOW_BIT = 0x00002000,
171 SCF_SENT_DELAYED_TAS = 0x00004000,
172 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
173 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
174 SCF_ACK_KREF = 0x00040000,
175 };
176
177 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
178 enum transport_lunflags_table {
179 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
180 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
181 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
182 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
183 };
184
185 /* struct se_device->dev_status */
186 enum transport_device_status_table {
187 TRANSPORT_DEVICE_ACTIVATED = 0x01,
188 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
189 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
190 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
191 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
192 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
193 };
194
195 /*
196 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
197 * to signal which ASC/ASCQ sense payload should be built.
198 */
199 enum tcm_sense_reason_table {
200 TCM_NON_EXISTENT_LUN = 0x01,
201 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
202 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
203 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
204 TCM_SERVICE_CRC_ERROR = 0x05,
205 TCM_SNACK_REJECTED = 0x06,
206 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
207 TCM_INVALID_CDB_FIELD = 0x08,
208 TCM_INVALID_PARAMETER_LIST = 0x09,
209 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
210 TCM_UNKNOWN_MODE_PAGE = 0x0b,
211 TCM_WRITE_PROTECTED = 0x0c,
212 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
213 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
214 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
215 TCM_RESERVATION_CONFLICT = 0x10,
216 };
217
218 enum target_sc_flags_table {
219 TARGET_SCF_BIDI_OP = 0x01,
220 TARGET_SCF_ACK_KREF = 0x02,
221 TARGET_SCF_UNKNOWN_SIZE = 0x04,
222 };
223
224 /* fabric independent task management function values */
225 enum tcm_tmreq_table {
226 TMR_ABORT_TASK = 1,
227 TMR_ABORT_TASK_SET = 2,
228 TMR_CLEAR_ACA = 3,
229 TMR_CLEAR_TASK_SET = 4,
230 TMR_LUN_RESET = 5,
231 TMR_TARGET_WARM_RESET = 6,
232 TMR_TARGET_COLD_RESET = 7,
233 TMR_FABRIC_TMR = 255,
234 };
235
236 /* fabric independent task management response values */
237 enum tcm_tmrsp_table {
238 TMR_FUNCTION_COMPLETE = 0,
239 TMR_TASK_DOES_NOT_EXIST = 1,
240 TMR_LUN_DOES_NOT_EXIST = 2,
241 TMR_TASK_STILL_ALLEGIANT = 3,
242 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
243 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5,
244 TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
245 TMR_FUNCTION_REJECTED = 255,
246 };
247
248 struct se_obj {
249 atomic_t obj_access_count;
250 };
251
252 /*
253 * Used by TCM Core internally to signal if ALUA emulation is enabled or
254 * disabled, or running in with TCM/pSCSI passthrough mode
255 */
256 typedef enum {
257 SPC_ALUA_PASSTHROUGH,
258 SPC2_ALUA_DISABLED,
259 SPC3_ALUA_EMULATED
260 } t10_alua_index_t;
261
262 /*
263 * Used by TCM Core internally to signal if SAM Task Attribute emulation
264 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
265 */
266 typedef enum {
267 SAM_TASK_ATTR_PASSTHROUGH,
268 SAM_TASK_ATTR_UNTAGGED,
269 SAM_TASK_ATTR_EMULATED
270 } t10_task_attr_index_t;
271
272 /*
273 * Used for target SCSI statistics
274 */
275 typedef enum {
276 SCSI_INST_INDEX,
277 SCSI_DEVICE_INDEX,
278 SCSI_AUTH_INTR_INDEX,
279 SCSI_INDEX_TYPE_MAX
280 } scsi_index_t;
281
282 struct se_cmd;
283
284 struct t10_alua {
285 t10_alua_index_t alua_type;
286 /* ALUA Target Port Group ID */
287 u16 alua_tg_pt_gps_counter;
288 u32 alua_tg_pt_gps_count;
289 spinlock_t tg_pt_gps_lock;
290 struct se_subsystem_dev *t10_sub_dev;
291 /* Used for default ALUA Target Port Group */
292 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
293 /* Used for default ALUA Target Port Group ConfigFS group */
294 struct config_group alua_tg_pt_gps_group;
295 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
296 struct list_head tg_pt_gps_list;
297 };
298
299 struct t10_alua_lu_gp {
300 u16 lu_gp_id;
301 int lu_gp_valid_id;
302 u32 lu_gp_members;
303 atomic_t lu_gp_ref_cnt;
304 spinlock_t lu_gp_lock;
305 struct config_group lu_gp_group;
306 struct list_head lu_gp_node;
307 struct list_head lu_gp_mem_list;
308 };
309
310 struct t10_alua_lu_gp_member {
311 bool lu_gp_assoc;
312 atomic_t lu_gp_mem_ref_cnt;
313 spinlock_t lu_gp_mem_lock;
314 struct t10_alua_lu_gp *lu_gp;
315 struct se_device *lu_gp_mem_dev;
316 struct list_head lu_gp_mem_list;
317 };
318
319 struct t10_alua_tg_pt_gp {
320 u16 tg_pt_gp_id;
321 int tg_pt_gp_valid_id;
322 int tg_pt_gp_alua_access_status;
323 int tg_pt_gp_alua_access_type;
324 int tg_pt_gp_nonop_delay_msecs;
325 int tg_pt_gp_trans_delay_msecs;
326 int tg_pt_gp_implict_trans_secs;
327 int tg_pt_gp_pref;
328 int tg_pt_gp_write_metadata;
329 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
330 #define ALUA_MD_BUF_LEN 1024
331 u32 tg_pt_gp_md_buf_len;
332 u32 tg_pt_gp_members;
333 atomic_t tg_pt_gp_alua_access_state;
334 atomic_t tg_pt_gp_ref_cnt;
335 spinlock_t tg_pt_gp_lock;
336 struct mutex tg_pt_gp_md_mutex;
337 struct se_subsystem_dev *tg_pt_gp_su_dev;
338 struct config_group tg_pt_gp_group;
339 struct list_head tg_pt_gp_list;
340 struct list_head tg_pt_gp_mem_list;
341 };
342
343 struct t10_alua_tg_pt_gp_member {
344 bool tg_pt_gp_assoc;
345 atomic_t tg_pt_gp_mem_ref_cnt;
346 spinlock_t tg_pt_gp_mem_lock;
347 struct t10_alua_tg_pt_gp *tg_pt_gp;
348 struct se_port *tg_pt;
349 struct list_head tg_pt_gp_mem_list;
350 };
351
352 struct t10_vpd {
353 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
354 int protocol_identifier_set;
355 u32 protocol_identifier;
356 u32 device_identifier_code_set;
357 u32 association;
358 u32 device_identifier_type;
359 struct list_head vpd_list;
360 };
361
362 struct t10_wwn {
363 char vendor[8];
364 char model[16];
365 char revision[4];
366 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
367 spinlock_t t10_vpd_lock;
368 struct se_subsystem_dev *t10_sub_dev;
369 struct config_group t10_wwn_group;
370 struct list_head t10_vpd_list;
371 };
372
373
374 /*
375 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
376 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
377 * mode
378 */
379 typedef enum {
380 SPC_PASSTHROUGH,
381 SPC2_RESERVATIONS,
382 SPC3_PERSISTENT_RESERVATIONS
383 } t10_reservations_index_t;
384
385 struct t10_pr_registration {
386 /* Used for fabrics that contain WWN+ISID */
387 #define PR_REG_ISID_LEN 16
388 /* PR_REG_ISID_LEN + ',i,0x' */
389 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
390 char pr_reg_isid[PR_REG_ISID_LEN];
391 /* Used during APTPL metadata reading */
392 #define PR_APTPL_MAX_IPORT_LEN 256
393 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
394 /* Used during APTPL metadata reading */
395 #define PR_APTPL_MAX_TPORT_LEN 256
396 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
397 /* For writing out live meta data */
398 unsigned char *pr_aptpl_buf;
399 u16 pr_aptpl_rpti;
400 u16 pr_reg_tpgt;
401 /* Reservation effects all target ports */
402 int pr_reg_all_tg_pt;
403 /* Activate Persistence across Target Power Loss */
404 int pr_reg_aptpl;
405 int pr_res_holder;
406 int pr_res_type;
407 int pr_res_scope;
408 /* Used for fabric initiator WWPNs using a ISID */
409 bool isid_present_at_reg;
410 u32 pr_res_mapped_lun;
411 u32 pr_aptpl_target_lun;
412 u32 pr_res_generation;
413 u64 pr_reg_bin_isid;
414 u64 pr_res_key;
415 atomic_t pr_res_holders;
416 struct se_node_acl *pr_reg_nacl;
417 struct se_dev_entry *pr_reg_deve;
418 struct se_lun *pr_reg_tg_pt_lun;
419 struct list_head pr_reg_list;
420 struct list_head pr_reg_abort_list;
421 struct list_head pr_reg_aptpl_list;
422 struct list_head pr_reg_atp_list;
423 struct list_head pr_reg_atp_mem_list;
424 };
425
426 /*
427 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
428 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
429 * core_setup_reservations()
430 */
431 struct t10_reservation_ops {
432 int (*t10_reservation_check)(struct se_cmd *, u32 *);
433 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
434 int (*t10_pr_register)(struct se_cmd *);
435 int (*t10_pr_clear)(struct se_cmd *);
436 };
437
438 struct t10_reservation {
439 /* Reservation effects all target ports */
440 int pr_all_tg_pt;
441 /* Activate Persistence across Target Power Loss enabled
442 * for SCSI device */
443 int pr_aptpl_active;
444 /* Used by struct t10_reservation->pr_aptpl_buf_len */
445 #define PR_APTPL_BUF_LEN 8192
446 u32 pr_aptpl_buf_len;
447 u32 pr_generation;
448 t10_reservations_index_t res_type;
449 spinlock_t registration_lock;
450 spinlock_t aptpl_reg_lock;
451 /*
452 * This will always be set by one individual I_T Nexus.
453 * However with all_tg_pt=1, other I_T Nexus from the
454 * same initiator can access PR reg/res info on a different
455 * target port.
456 *
457 * There is also the 'All Registrants' case, where there is
458 * a single *pr_res_holder of the reservation, but all
459 * registrations are considered reservation holders.
460 */
461 struct se_node_acl *pr_res_holder;
462 struct list_head registration_list;
463 struct list_head aptpl_reg_list;
464 struct t10_reservation_ops pr_ops;
465 };
466
467 struct se_queue_obj {
468 atomic_t queue_cnt;
469 spinlock_t cmd_queue_lock;
470 struct list_head qobj_list;
471 wait_queue_head_t thread_wq;
472 };
473
474 struct se_tmr_req {
475 /* Task Management function to be performed */
476 u8 function;
477 /* Task Management response to send */
478 u8 response;
479 int call_transport;
480 /* Reference to ITT that Task Mgmt should be performed */
481 u32 ref_task_tag;
482 void *fabric_tmr_ptr;
483 struct se_cmd *task_cmd;
484 struct se_device *tmr_dev;
485 struct se_lun *tmr_lun;
486 struct list_head tmr_list;
487 };
488
489 struct se_cmd {
490 /* SAM response code being sent to initiator */
491 u8 scsi_status;
492 u8 scsi_asc;
493 u8 scsi_ascq;
494 u8 scsi_sense_reason;
495 u16 scsi_sense_length;
496 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
497 int alua_nonop_delay;
498 /* See include/linux/dma-mapping.h */
499 enum dma_data_direction data_direction;
500 /* For SAM Task Attribute */
501 int sam_task_attr;
502 /* Transport protocol dependent state, see transport_state_table */
503 enum transport_state_table t_state;
504 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
505 unsigned check_release:1;
506 unsigned cmd_wait_set:1;
507 unsigned unknown_data_length:1;
508 /* See se_cmd_flags_table */
509 u32 se_cmd_flags;
510 u32 se_ordered_id;
511 /* Total size in bytes associated with command */
512 u32 data_length;
513 /* SCSI Presented Data Transfer Length */
514 u32 cmd_spdtl;
515 u32 residual_count;
516 u32 orig_fe_lun;
517 /* Persistent Reservation key */
518 u64 pr_res_key;
519 /* Used for sense data */
520 void *sense_buffer;
521 struct list_head se_delayed_node;
522 struct list_head se_lun_node;
523 struct list_head se_qf_node;
524 struct se_device *se_dev;
525 struct se_dev_entry *se_deve;
526 struct se_lun *se_lun;
527 /* Only used for internal passthrough and legacy TCM fabric modules */
528 struct se_session *se_sess;
529 struct se_tmr_req *se_tmr_req;
530 struct list_head se_queue_node;
531 struct list_head se_cmd_list;
532 struct completion cmd_wait_comp;
533 struct kref cmd_kref;
534 struct target_core_fabric_ops *se_tfo;
535 int (*execute_cmd)(struct se_cmd *);
536 void (*transport_complete_callback)(struct se_cmd *);
537
538 unsigned char *t_task_cdb;
539 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
540 unsigned long long t_task_lba;
541 atomic_t t_fe_count;
542 unsigned int transport_state;
543 #define CMD_T_ABORTED (1 << 0)
544 #define CMD_T_ACTIVE (1 << 1)
545 #define CMD_T_COMPLETE (1 << 2)
546 #define CMD_T_QUEUED (1 << 3)
547 #define CMD_T_SENT (1 << 4)
548 #define CMD_T_STOP (1 << 5)
549 #define CMD_T_FAILED (1 << 6)
550 #define CMD_T_LUN_STOP (1 << 7)
551 #define CMD_T_LUN_FE_STOP (1 << 8)
552 #define CMD_T_DEV_ACTIVE (1 << 9)
553 #define CMD_T_REQUEST_STOP (1 << 10)
554 #define CMD_T_BUSY (1 << 11)
555 spinlock_t t_state_lock;
556 struct completion t_transport_stop_comp;
557 struct completion transport_lun_fe_stop_comp;
558 struct completion transport_lun_stop_comp;
559
560 struct work_struct work;
561
562 struct scatterlist *t_data_sg;
563 unsigned int t_data_nents;
564 void *t_data_vmap;
565 struct scatterlist *t_bidi_data_sg;
566 unsigned int t_bidi_data_nents;
567
568 struct list_head state_list;
569 bool state_active;
570
571 /* old task stop completion, consider merging with some of the above */
572 struct completion task_stop_comp;
573
574 /* backend private data */
575 void *priv;
576 };
577
578 struct se_ua {
579 u8 ua_asc;
580 u8 ua_ascq;
581 struct se_node_acl *ua_nacl;
582 struct list_head ua_dev_list;
583 struct list_head ua_nacl_list;
584 };
585
586 struct se_node_acl {
587 char initiatorname[TRANSPORT_IQN_LEN];
588 /* Used to signal demo mode created ACL, disabled by default */
589 bool dynamic_node_acl;
590 bool acl_stop:1;
591 u32 queue_depth;
592 u32 acl_index;
593 u64 num_cmds;
594 u64 read_bytes;
595 u64 write_bytes;
596 spinlock_t stats_lock;
597 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
598 atomic_t acl_pr_ref_count;
599 struct se_dev_entry **device_list;
600 struct se_session *nacl_sess;
601 struct se_portal_group *se_tpg;
602 spinlock_t device_list_lock;
603 spinlock_t nacl_sess_lock;
604 struct config_group acl_group;
605 struct config_group acl_attrib_group;
606 struct config_group acl_auth_group;
607 struct config_group acl_param_group;
608 struct config_group acl_fabric_stat_group;
609 struct config_group *acl_default_groups[5];
610 struct list_head acl_list;
611 struct list_head acl_sess_list;
612 struct completion acl_free_comp;
613 struct kref acl_kref;
614 };
615
616 struct se_session {
617 unsigned sess_tearing_down:1;
618 u64 sess_bin_isid;
619 struct se_node_acl *se_node_acl;
620 struct se_portal_group *se_tpg;
621 void *fabric_sess_ptr;
622 struct list_head sess_list;
623 struct list_head sess_acl_list;
624 struct list_head sess_cmd_list;
625 struct list_head sess_wait_list;
626 spinlock_t sess_cmd_lock;
627 struct kref sess_kref;
628 };
629
630 struct se_device;
631 struct se_transform_info;
632 struct scatterlist;
633
634 struct se_ml_stat_grps {
635 struct config_group stat_group;
636 struct config_group scsi_auth_intr_group;
637 struct config_group scsi_att_intr_port_group;
638 };
639
640 struct se_lun_acl {
641 char initiatorname[TRANSPORT_IQN_LEN];
642 u32 mapped_lun;
643 struct se_node_acl *se_lun_nacl;
644 struct se_lun *se_lun;
645 struct list_head lacl_list;
646 struct config_group se_lun_group;
647 struct se_ml_stat_grps ml_stat_grps;
648 };
649
650 struct se_dev_entry {
651 bool def_pr_registered;
652 /* See transport_lunflags_table */
653 u32 lun_flags;
654 u32 deve_cmds;
655 u32 mapped_lun;
656 u32 average_bytes;
657 u32 last_byte_count;
658 u32 total_cmds;
659 u32 total_bytes;
660 u64 pr_res_key;
661 u64 creation_time;
662 u32 attach_count;
663 u64 read_bytes;
664 u64 write_bytes;
665 atomic_t ua_count;
666 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
667 atomic_t pr_ref_count;
668 struct se_lun_acl *se_lun_acl;
669 spinlock_t ua_lock;
670 struct se_lun *se_lun;
671 struct list_head alua_port_list;
672 struct list_head ua_list;
673 };
674
675 struct se_dev_limits {
676 /* Max supported HW queue depth */
677 u32 hw_queue_depth;
678 /* Max supported virtual queue depth */
679 u32 queue_depth;
680 /* From include/linux/blkdev.h for the other HW/SW limits. */
681 struct queue_limits limits;
682 };
683
684 struct se_dev_attrib {
685 int emulate_dpo;
686 int emulate_fua_write;
687 int emulate_fua_read;
688 int emulate_write_cache;
689 int emulate_ua_intlck_ctrl;
690 int emulate_tas;
691 int emulate_tpu;
692 int emulate_tpws;
693 int emulate_reservations;
694 int emulate_alua;
695 int enforce_pr_isids;
696 int is_nonrot;
697 int emulate_rest_reord;
698 u32 hw_block_size;
699 u32 block_size;
700 u32 hw_max_sectors;
701 u32 fabric_max_sectors;
702 u32 optimal_sectors;
703 u32 hw_queue_depth;
704 u32 queue_depth;
705 u32 max_unmap_lba_count;
706 u32 max_unmap_block_desc_count;
707 u32 unmap_granularity;
708 u32 unmap_granularity_alignment;
709 struct se_subsystem_dev *da_sub_dev;
710 struct config_group da_group;
711 };
712
713 struct se_dev_stat_grps {
714 struct config_group stat_group;
715 struct config_group scsi_dev_group;
716 struct config_group scsi_tgt_dev_group;
717 struct config_group scsi_lu_group;
718 };
719
720 struct se_subsystem_dev {
721 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
722 #define SE_DEV_ALIAS_LEN 512
723 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
724 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
725 #define SE_UDEV_PATH_LEN 512
726 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
727 u32 su_dev_flags;
728 struct se_hba *se_dev_hba;
729 struct se_device *se_dev_ptr;
730 struct se_dev_attrib se_dev_attrib;
731 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
732 struct t10_alua t10_alua;
733 /* T10 Inquiry and VPD WWN Information */
734 struct t10_wwn t10_wwn;
735 /* T10 SPC-2 + SPC-3 Reservations */
736 struct t10_reservation t10_pr;
737 spinlock_t se_dev_lock;
738 void *se_dev_su_ptr;
739 struct config_group se_dev_group;
740 /* For T10 Reservations */
741 struct config_group se_dev_pr_group;
742 /* For target_core_stat.c groups */
743 struct se_dev_stat_grps dev_stat_grps;
744 };
745
746 struct se_device {
747 /* RELATIVE TARGET PORT IDENTIFER Counter */
748 u16 dev_rpti_counter;
749 /* Used for SAM Task Attribute ordering */
750 u32 dev_cur_ordered_id;
751 u32 dev_flags;
752 u32 dev_port_count;
753 /* See transport_device_status_table */
754 u32 dev_status;
755 /* Physical device queue depth */
756 u32 queue_depth;
757 /* Used for SPC-2 reservations enforce of ISIDs */
758 u64 dev_res_bin_isid;
759 t10_task_attr_index_t dev_task_attr_type;
760 /* Pointer to transport specific device structure */
761 void *dev_ptr;
762 u32 dev_index;
763 u64 creation_time;
764 u32 num_resets;
765 u64 num_cmds;
766 u64 read_bytes;
767 u64 write_bytes;
768 spinlock_t stats_lock;
769 /* Active commands on this virtual SE device */
770 atomic_t simple_cmds;
771 atomic_t dev_ordered_id;
772 atomic_t dev_ordered_sync;
773 atomic_t dev_qf_count;
774 struct se_obj dev_obj;
775 struct se_obj dev_access_obj;
776 struct se_obj dev_export_obj;
777 struct se_queue_obj dev_queue_obj;
778 spinlock_t delayed_cmd_lock;
779 spinlock_t execute_task_lock;
780 spinlock_t dev_reservation_lock;
781 spinlock_t dev_status_lock;
782 spinlock_t se_port_lock;
783 spinlock_t se_tmr_lock;
784 spinlock_t qf_cmd_lock;
785 /* Used for legacy SPC-2 reservationsa */
786 struct se_node_acl *dev_reserved_node_acl;
787 /* Used for ALUA Logical Unit Group membership */
788 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
789 /* Used for SPC-3 Persistent Reservations */
790 struct t10_pr_registration *dev_pr_res_holder;
791 struct list_head dev_sep_list;
792 struct list_head dev_tmr_list;
793 /* Pointer to descriptor for processing thread */
794 struct task_struct *process_thread;
795 struct work_struct qf_work_queue;
796 struct list_head delayed_cmd_list;
797 struct list_head state_list;
798 struct list_head qf_cmd_list;
799 /* Pointer to associated SE HBA */
800 struct se_hba *se_hba;
801 struct se_subsystem_dev *se_sub_dev;
802 /* Pointer to template of function pointers for transport */
803 struct se_subsystem_api *transport;
804 /* Linked list for struct se_hba struct se_device list */
805 struct list_head dev_list;
806 };
807
808 struct se_hba {
809 u16 hba_tpgt;
810 u32 hba_id;
811 /* See hba_flags_table */
812 u32 hba_flags;
813 /* Virtual iSCSI devices attached. */
814 u32 dev_count;
815 u32 hba_index;
816 /* Pointer to transport specific host structure. */
817 void *hba_ptr;
818 /* Linked list for struct se_device */
819 struct list_head hba_dev_list;
820 struct list_head hba_node;
821 spinlock_t device_lock;
822 struct config_group hba_group;
823 struct mutex hba_access_mutex;
824 struct se_subsystem_api *transport;
825 };
826
827 struct se_port_stat_grps {
828 struct config_group stat_group;
829 struct config_group scsi_port_group;
830 struct config_group scsi_tgt_port_group;
831 struct config_group scsi_transport_group;
832 };
833
834 struct se_lun {
835 /* See transport_lun_status_table */
836 enum transport_lun_status_table lun_status;
837 u32 lun_access;
838 u32 lun_flags;
839 u32 unpacked_lun;
840 atomic_t lun_acl_count;
841 spinlock_t lun_acl_lock;
842 spinlock_t lun_cmd_lock;
843 spinlock_t lun_sep_lock;
844 struct completion lun_shutdown_comp;
845 struct list_head lun_cmd_list;
846 struct list_head lun_acl_list;
847 struct se_device *lun_se_dev;
848 struct se_port *lun_sep;
849 struct config_group lun_group;
850 struct se_port_stat_grps port_stat_grps;
851 };
852
853 struct scsi_port_stats {
854 u64 cmd_pdus;
855 u64 tx_data_octets;
856 u64 rx_data_octets;
857 };
858
859 struct se_port {
860 /* RELATIVE TARGET PORT IDENTIFER */
861 u16 sep_rtpi;
862 int sep_tg_pt_secondary_stat;
863 int sep_tg_pt_secondary_write_md;
864 u32 sep_index;
865 struct scsi_port_stats sep_stats;
866 /* Used for ALUA Target Port Groups membership */
867 atomic_t sep_tg_pt_secondary_offline;
868 /* Used for PR ALL_TG_PT=1 */
869 atomic_t sep_tg_pt_ref_cnt;
870 spinlock_t sep_alua_lock;
871 struct mutex sep_tg_pt_md_mutex;
872 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
873 struct se_lun *sep_lun;
874 struct se_portal_group *sep_tpg;
875 struct list_head sep_alua_list;
876 struct list_head sep_list;
877 };
878
879 struct se_tpg_np {
880 struct se_portal_group *tpg_np_parent;
881 struct config_group tpg_np_group;
882 };
883
884 struct se_portal_group {
885 /* Type of target portal group, see transport_tpg_type_table */
886 enum transport_tpg_type_table se_tpg_type;
887 /* Number of ACLed Initiator Nodes for this TPG */
888 u32 num_node_acls;
889 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
890 atomic_t tpg_pr_ref_count;
891 /* Spinlock for adding/removing ACLed Nodes */
892 spinlock_t acl_node_lock;
893 /* Spinlock for adding/removing sessions */
894 spinlock_t session_lock;
895 spinlock_t tpg_lun_lock;
896 /* Pointer to $FABRIC_MOD portal group */
897 void *se_tpg_fabric_ptr;
898 struct list_head se_tpg_node;
899 /* linked list for initiator ACL list */
900 struct list_head acl_node_list;
901 struct se_lun **tpg_lun_list;
902 struct se_lun tpg_virt_lun0;
903 /* List of TCM sessions associated wth this TPG */
904 struct list_head tpg_sess_list;
905 /* Pointer to $FABRIC_MOD dependent code */
906 struct target_core_fabric_ops *se_tpg_tfo;
907 struct se_wwn *se_tpg_wwn;
908 struct config_group tpg_group;
909 struct config_group *tpg_default_groups[6];
910 struct config_group tpg_lun_group;
911 struct config_group tpg_np_group;
912 struct config_group tpg_acl_group;
913 struct config_group tpg_attrib_group;
914 struct config_group tpg_param_group;
915 };
916
917 struct se_wwn {
918 struct target_fabric_configfs *wwn_tf;
919 struct config_group wwn_group;
920 struct config_group *wwn_default_groups[2];
921 struct config_group fabric_stat_group;
922 };
923
924 #endif /* TARGET_CORE_BASE_H */
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