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Linux 3.8-rc7
[cris-mirror.git] / include / target / target_core_base.h
blob663e34a5383f269d7c54a67f80fe9e73cbff1385
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 /* struct se_dev_attrib sanity values */
66 /* Default max_unmap_lba_count */
67 #define DA_MAX_UNMAP_LBA_COUNT 0
68 /* Default max_unmap_block_desc_count */
69 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
70 /* Default unmap_granularity */
71 #define DA_UNMAP_GRANULARITY_DEFAULT 0
72 /* Default unmap_granularity_alignment */
73 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
74 /* Default max_write_same_len, disabled by default */
75 #define DA_MAX_WRITE_SAME_LEN 0
76 /* Default max transfer length */
77 #define DA_FABRIC_MAX_SECTORS 8192
78 /* Emulation for Direct Page Out */
79 #define DA_EMULATE_DPO 0
80 /* Emulation for Forced Unit Access WRITEs */
81 #define DA_EMULATE_FUA_WRITE 1
82 /* Emulation for Forced Unit Access READs */
83 #define DA_EMULATE_FUA_READ 0
84 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
85 #define DA_EMULATE_WRITE_CACHE 0
86 /* Emulation for UNIT ATTENTION Interlock Control */
87 #define DA_EMULATE_UA_INTLLCK_CTRL 0
88 /* Emulation for TASK_ABORTED status (TAS) by default */
89 #define DA_EMULATE_TAS 1
90 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
91 #define DA_EMULATE_TPU 0
92 /*
93 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
94 * block/blk-lib.c:blkdev_issue_discard()
95 */
96 #define DA_EMULATE_TPWS 0
97 /* No Emulation for PSCSI by default */
98 #define DA_EMULATE_ALUA 0
99 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
100 #define DA_ENFORCE_PR_ISIDS 1
101 #define DA_STATUS_MAX_SECTORS_MIN 16
102 #define DA_STATUS_MAX_SECTORS_MAX 8192
103 /* By default don't report non-rotating (solid state) medium */
104 #define DA_IS_NONROT 0
105 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
106 #define DA_EMULATE_REST_REORD 0
107
108 #define SE_INQUIRY_BUF 512
109 #define SE_MODE_PAGE_BUF 512
110 #define SE_SENSE_BUF 96
111
112 /* struct se_hba->hba_flags */
113 enum hba_flags_table {
114 HBA_FLAGS_INTERNAL_USE = 0x01,
115 HBA_FLAGS_PSCSI_MODE = 0x02,
116 };
117
118 /* struct se_lun->lun_status */
119 enum transport_lun_status_table {
120 TRANSPORT_LUN_STATUS_FREE = 0,
121 TRANSPORT_LUN_STATUS_ACTIVE = 1,
122 };
123
124 /* struct se_portal_group->se_tpg_type */
125 enum transport_tpg_type_table {
126 TRANSPORT_TPG_TYPE_NORMAL = 0,
127 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
128 };
129
130 /* Special transport agnostic struct se_cmd->t_states */
131 enum transport_state_table {
132 TRANSPORT_NO_STATE = 0,
133 TRANSPORT_NEW_CMD = 1,
134 TRANSPORT_WRITE_PENDING = 3,
135 TRANSPORT_PROCESSING = 5,
136 TRANSPORT_COMPLETE = 6,
137 TRANSPORT_ISTATE_PROCESSING = 11,
138 TRANSPORT_COMPLETE_QF_WP = 18,
139 TRANSPORT_COMPLETE_QF_OK = 19,
140 };
141
142 /* Used for struct se_cmd->se_cmd_flags */
143 enum se_cmd_flags_table {
144 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
145 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
146 SCF_EMULATED_TASK_SENSE = 0x00000004,
147 SCF_SCSI_DATA_CDB = 0x00000008,
148 SCF_SCSI_TMR_CDB = 0x00000010,
149 SCF_FUA = 0x00000080,
150 SCF_SE_LUN_CMD = 0x00000100,
151 SCF_BIDI = 0x00000400,
152 SCF_SENT_CHECK_CONDITION = 0x00000800,
153 SCF_OVERFLOW_BIT = 0x00001000,
154 SCF_UNDERFLOW_BIT = 0x00002000,
155 SCF_SENT_DELAYED_TAS = 0x00004000,
156 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
157 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
158 SCF_ACK_KREF = 0x00040000,
159 };
160
161 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
162 enum transport_lunflags_table {
163 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
164 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
165 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
166 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
167 };
168
169 /*
170 * Used by transport_send_check_condition_and_sense()
171 * to signal which ASC/ASCQ sense payload should be built.
172 */
173 typedef unsigned __bitwise__ sense_reason_t;
174
175 enum tcm_sense_reason_table {
176 #define R(x) (__force sense_reason_t )(x)
177 TCM_NO_SENSE = R(0x00),
178 TCM_NON_EXISTENT_LUN = R(0x01),
179 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
180 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
181 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
182 TCM_SERVICE_CRC_ERROR = R(0x05),
183 TCM_SNACK_REJECTED = R(0x06),
184 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
185 TCM_INVALID_CDB_FIELD = R(0x08),
186 TCM_INVALID_PARAMETER_LIST = R(0x09),
187 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
188 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
189 TCM_WRITE_PROTECTED = R(0x0c),
190 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
191 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
192 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
193 TCM_RESERVATION_CONFLICT = R(0x10),
194 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
195 TCM_OUT_OF_RESOURCES = R(0x12),
196 #undef R
197 };
198
199 enum target_sc_flags_table {
200 TARGET_SCF_BIDI_OP = 0x01,
201 TARGET_SCF_ACK_KREF = 0x02,
202 TARGET_SCF_UNKNOWN_SIZE = 0x04,
203 };
204
205 /* fabric independent task management function values */
206 enum tcm_tmreq_table {
207 TMR_ABORT_TASK = 1,
208 TMR_ABORT_TASK_SET = 2,
209 TMR_CLEAR_ACA = 3,
210 TMR_CLEAR_TASK_SET = 4,
211 TMR_LUN_RESET = 5,
212 TMR_TARGET_WARM_RESET = 6,
213 TMR_TARGET_COLD_RESET = 7,
214 TMR_FABRIC_TMR = 255,
215 };
216
217 /* fabric independent task management response values */
218 enum tcm_tmrsp_table {
219 TMR_FUNCTION_COMPLETE = 0,
220 TMR_TASK_DOES_NOT_EXIST = 1,
221 TMR_LUN_DOES_NOT_EXIST = 2,
222 TMR_TASK_STILL_ALLEGIANT = 3,
223 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
224 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5,
225 TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
226 TMR_FUNCTION_REJECTED = 255,
227 };
228
229 /*
230 * Used for target SCSI statistics
231 */
232 typedef enum {
233 SCSI_INST_INDEX,
234 SCSI_DEVICE_INDEX,
235 SCSI_AUTH_INTR_INDEX,
236 SCSI_INDEX_TYPE_MAX
237 } scsi_index_t;
238
239 struct se_cmd;
240
241 struct t10_alua {
242 /* ALUA Target Port Group ID */
243 u16 alua_tg_pt_gps_counter;
244 u32 alua_tg_pt_gps_count;
245 spinlock_t tg_pt_gps_lock;
246 struct se_device *t10_dev;
247 /* Used for default ALUA Target Port Group */
248 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
249 /* Used for default ALUA Target Port Group ConfigFS group */
250 struct config_group alua_tg_pt_gps_group;
251 struct list_head tg_pt_gps_list;
252 };
253
254 struct t10_alua_lu_gp {
255 u16 lu_gp_id;
256 int lu_gp_valid_id;
257 u32 lu_gp_members;
258 atomic_t lu_gp_ref_cnt;
259 spinlock_t lu_gp_lock;
260 struct config_group lu_gp_group;
261 struct list_head lu_gp_node;
262 struct list_head lu_gp_mem_list;
263 };
264
265 struct t10_alua_lu_gp_member {
266 bool lu_gp_assoc;
267 atomic_t lu_gp_mem_ref_cnt;
268 spinlock_t lu_gp_mem_lock;
269 struct t10_alua_lu_gp *lu_gp;
270 struct se_device *lu_gp_mem_dev;
271 struct list_head lu_gp_mem_list;
272 };
273
274 struct t10_alua_tg_pt_gp {
275 u16 tg_pt_gp_id;
276 int tg_pt_gp_valid_id;
277 int tg_pt_gp_alua_access_status;
278 int tg_pt_gp_alua_access_type;
279 int tg_pt_gp_nonop_delay_msecs;
280 int tg_pt_gp_trans_delay_msecs;
281 int tg_pt_gp_implict_trans_secs;
282 int tg_pt_gp_pref;
283 int tg_pt_gp_write_metadata;
284 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
285 #define ALUA_MD_BUF_LEN 1024
286 u32 tg_pt_gp_md_buf_len;
287 u32 tg_pt_gp_members;
288 atomic_t tg_pt_gp_alua_access_state;
289 atomic_t tg_pt_gp_ref_cnt;
290 spinlock_t tg_pt_gp_lock;
291 struct mutex tg_pt_gp_md_mutex;
292 struct se_device *tg_pt_gp_dev;
293 struct config_group tg_pt_gp_group;
294 struct list_head tg_pt_gp_list;
295 struct list_head tg_pt_gp_mem_list;
296 };
297
298 struct t10_alua_tg_pt_gp_member {
299 bool tg_pt_gp_assoc;
300 atomic_t tg_pt_gp_mem_ref_cnt;
301 spinlock_t tg_pt_gp_mem_lock;
302 struct t10_alua_tg_pt_gp *tg_pt_gp;
303 struct se_port *tg_pt;
304 struct list_head tg_pt_gp_mem_list;
305 };
306
307 struct t10_vpd {
308 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
309 int protocol_identifier_set;
310 u32 protocol_identifier;
311 u32 device_identifier_code_set;
312 u32 association;
313 u32 device_identifier_type;
314 struct list_head vpd_list;
315 };
316
317 struct t10_wwn {
318 char vendor[8];
319 char model[16];
320 char revision[4];
321 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
322 spinlock_t t10_vpd_lock;
323 struct se_device *t10_dev;
324 struct config_group t10_wwn_group;
325 struct list_head t10_vpd_list;
326 };
327
328 struct t10_pr_registration {
329 /* Used for fabrics that contain WWN+ISID */
330 #define PR_REG_ISID_LEN 16
331 /* PR_REG_ISID_LEN + ',i,0x' */
332 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
333 char pr_reg_isid[PR_REG_ISID_LEN];
334 /* Used during APTPL metadata reading */
335 #define PR_APTPL_MAX_IPORT_LEN 256
336 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
337 /* Used during APTPL metadata reading */
338 #define PR_APTPL_MAX_TPORT_LEN 256
339 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
340 /* For writing out live meta data */
341 unsigned char *pr_aptpl_buf;
342 u16 pr_aptpl_rpti;
343 u16 pr_reg_tpgt;
344 /* Reservation effects all target ports */
345 int pr_reg_all_tg_pt;
346 /* Activate Persistence across Target Power Loss */
347 int pr_reg_aptpl;
348 int pr_res_holder;
349 int pr_res_type;
350 int pr_res_scope;
351 /* Used for fabric initiator WWPNs using a ISID */
352 bool isid_present_at_reg;
353 u32 pr_res_mapped_lun;
354 u32 pr_aptpl_target_lun;
355 u32 pr_res_generation;
356 u64 pr_reg_bin_isid;
357 u64 pr_res_key;
358 atomic_t pr_res_holders;
359 struct se_node_acl *pr_reg_nacl;
360 struct se_dev_entry *pr_reg_deve;
361 struct se_lun *pr_reg_tg_pt_lun;
362 struct list_head pr_reg_list;
363 struct list_head pr_reg_abort_list;
364 struct list_head pr_reg_aptpl_list;
365 struct list_head pr_reg_atp_list;
366 struct list_head pr_reg_atp_mem_list;
367 };
368
369 struct t10_reservation {
370 /* Reservation effects all target ports */
371 int pr_all_tg_pt;
372 /* Activate Persistence across Target Power Loss enabled
373 * for SCSI device */
374 int pr_aptpl_active;
375 /* Used by struct t10_reservation->pr_aptpl_buf_len */
376 #define PR_APTPL_BUF_LEN 8192
377 u32 pr_aptpl_buf_len;
378 u32 pr_generation;
379 spinlock_t registration_lock;
380 spinlock_t aptpl_reg_lock;
381 /*
382 * This will always be set by one individual I_T Nexus.
383 * However with all_tg_pt=1, other I_T Nexus from the
384 * same initiator can access PR reg/res info on a different
385 * target port.
386 *
387 * There is also the 'All Registrants' case, where there is
388 * a single *pr_res_holder of the reservation, but all
389 * registrations are considered reservation holders.
390 */
391 struct se_node_acl *pr_res_holder;
392 struct list_head registration_list;
393 struct list_head aptpl_reg_list;
394 };
395
396 struct se_tmr_req {
397 /* Task Management function to be performed */
398 u8 function;
399 /* Task Management response to send */
400 u8 response;
401 int call_transport;
402 /* Reference to ITT that Task Mgmt should be performed */
403 u32 ref_task_tag;
404 void *fabric_tmr_ptr;
405 struct se_cmd *task_cmd;
406 struct se_device *tmr_dev;
407 struct se_lun *tmr_lun;
408 struct list_head tmr_list;
409 };
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 u16 scsi_sense_length;
417 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
418 int alua_nonop_delay;
419 /* See include/linux/dma-mapping.h */
420 enum dma_data_direction data_direction;
421 /* For SAM Task Attribute */
422 int sam_task_attr;
423 /* Transport protocol dependent state, see transport_state_table */
424 enum transport_state_table t_state;
425 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
426 unsigned check_release:1;
427 unsigned cmd_wait_set:1;
428 unsigned unknown_data_length: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 u32 residual_count;
435 u32 orig_fe_lun;
436 /* Persistent Reservation key */
437 u64 pr_res_key;
438 /* Used for sense data */
439 void *sense_buffer;
440 struct list_head se_delayed_node;
441 struct list_head se_lun_node;
442 struct list_head se_qf_node;
443 struct se_device *se_dev;
444 struct se_dev_entry *se_deve;
445 struct se_lun *se_lun;
446 /* Only used for internal passthrough and legacy TCM fabric modules */
447 struct se_session *se_sess;
448 struct se_tmr_req *se_tmr_req;
449 struct list_head se_cmd_list;
450 struct completion cmd_wait_comp;
451 struct kref cmd_kref;
452 struct target_core_fabric_ops *se_tfo;
453 sense_reason_t (*execute_cmd)(struct se_cmd *);
454 void (*transport_complete_callback)(struct se_cmd *);
455
456 unsigned char *t_task_cdb;
457 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
458 unsigned long long t_task_lba;
459 atomic_t t_fe_count;
460 unsigned int transport_state;
461 #define CMD_T_ABORTED (1 << 0)
462 #define CMD_T_ACTIVE (1 << 1)
463 #define CMD_T_COMPLETE (1 << 2)
464 #define CMD_T_QUEUED (1 << 3)
465 #define CMD_T_SENT (1 << 4)
466 #define CMD_T_STOP (1 << 5)
467 #define CMD_T_FAILED (1 << 6)
468 #define CMD_T_LUN_STOP (1 << 7)
469 #define CMD_T_LUN_FE_STOP (1 << 8)
470 #define CMD_T_DEV_ACTIVE (1 << 9)
471 #define CMD_T_REQUEST_STOP (1 << 10)
472 #define CMD_T_BUSY (1 << 11)
473 spinlock_t t_state_lock;
474 struct completion t_transport_stop_comp;
475 struct completion transport_lun_fe_stop_comp;
476 struct completion transport_lun_stop_comp;
477
478 struct work_struct work;
479
480 struct scatterlist *t_data_sg;
481 unsigned int t_data_nents;
482 void *t_data_vmap;
483 struct scatterlist *t_bidi_data_sg;
484 unsigned int t_bidi_data_nents;
485
486 struct list_head state_list;
487 bool state_active;
488
489 /* old task stop completion, consider merging with some of the above */
490 struct completion task_stop_comp;
491
492 /* backend private data */
493 void *priv;
494 };
495
496 struct se_ua {
497 u8 ua_asc;
498 u8 ua_ascq;
499 struct se_node_acl *ua_nacl;
500 struct list_head ua_dev_list;
501 struct list_head ua_nacl_list;
502 };
503
504 struct se_node_acl {
505 char initiatorname[TRANSPORT_IQN_LEN];
506 /* Used to signal demo mode created ACL, disabled by default */
507 bool dynamic_node_acl;
508 bool acl_stop:1;
509 u32 queue_depth;
510 u32 acl_index;
511 #define MAX_ACL_TAG_SIZE 64
512 char acl_tag[MAX_ACL_TAG_SIZE];
513 u64 num_cmds;
514 u64 read_bytes;
515 u64 write_bytes;
516 spinlock_t stats_lock;
517 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
518 atomic_t acl_pr_ref_count;
519 struct se_dev_entry **device_list;
520 struct se_session *nacl_sess;
521 struct se_portal_group *se_tpg;
522 spinlock_t device_list_lock;
523 spinlock_t nacl_sess_lock;
524 struct config_group acl_group;
525 struct config_group acl_attrib_group;
526 struct config_group acl_auth_group;
527 struct config_group acl_param_group;
528 struct config_group acl_fabric_stat_group;
529 struct config_group *acl_default_groups[5];
530 struct list_head acl_list;
531 struct list_head acl_sess_list;
532 struct completion acl_free_comp;
533 struct kref acl_kref;
534 };
535
536 struct se_session {
537 unsigned sess_tearing_down:1;
538 u64 sess_bin_isid;
539 struct se_node_acl *se_node_acl;
540 struct se_portal_group *se_tpg;
541 void *fabric_sess_ptr;
542 struct list_head sess_list;
543 struct list_head sess_acl_list;
544 struct list_head sess_cmd_list;
545 spinlock_t sess_cmd_lock;
546 struct kref sess_kref;
547 };
548
549 struct se_device;
550 struct se_transform_info;
551 struct scatterlist;
552
553 struct se_ml_stat_grps {
554 struct config_group stat_group;
555 struct config_group scsi_auth_intr_group;
556 struct config_group scsi_att_intr_port_group;
557 };
558
559 struct se_lun_acl {
560 char initiatorname[TRANSPORT_IQN_LEN];
561 u32 mapped_lun;
562 struct se_node_acl *se_lun_nacl;
563 struct se_lun *se_lun;
564 struct list_head lacl_list;
565 struct config_group se_lun_group;
566 struct se_ml_stat_grps ml_stat_grps;
567 };
568
569 struct se_dev_entry {
570 bool def_pr_registered;
571 /* See transport_lunflags_table */
572 u32 lun_flags;
573 u32 deve_cmds;
574 u32 mapped_lun;
575 u32 average_bytes;
576 u32 last_byte_count;
577 u32 total_cmds;
578 u32 total_bytes;
579 u64 pr_res_key;
580 u64 creation_time;
581 u32 attach_count;
582 u64 read_bytes;
583 u64 write_bytes;
584 atomic_t ua_count;
585 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
586 atomic_t pr_ref_count;
587 struct se_lun_acl *se_lun_acl;
588 spinlock_t ua_lock;
589 struct se_lun *se_lun;
590 struct list_head alua_port_list;
591 struct list_head ua_list;
592 };
593
594 struct se_dev_attrib {
595 int emulate_dpo;
596 int emulate_fua_write;
597 int emulate_fua_read;
598 int emulate_write_cache;
599 int emulate_ua_intlck_ctrl;
600 int emulate_tas;
601 int emulate_tpu;
602 int emulate_tpws;
603 int enforce_pr_isids;
604 int is_nonrot;
605 int emulate_rest_reord;
606 u32 hw_block_size;
607 u32 block_size;
608 u32 hw_max_sectors;
609 u32 fabric_max_sectors;
610 u32 optimal_sectors;
611 u32 hw_queue_depth;
612 u32 queue_depth;
613 u32 max_unmap_lba_count;
614 u32 max_unmap_block_desc_count;
615 u32 unmap_granularity;
616 u32 unmap_granularity_alignment;
617 u32 max_write_same_len;
618 struct se_device *da_dev;
619 struct config_group da_group;
620 };
621
622 struct se_dev_stat_grps {
623 struct config_group stat_group;
624 struct config_group scsi_dev_group;
625 struct config_group scsi_tgt_dev_group;
626 struct config_group scsi_lu_group;
627 };
628
629 struct se_device {
630 #define SE_DEV_LINK_MAGIC 0xfeeddeef
631 u32 dev_link_magic;
632 /* RELATIVE TARGET PORT IDENTIFER Counter */
633 u16 dev_rpti_counter;
634 /* Used for SAM Task Attribute ordering */
635 u32 dev_cur_ordered_id;
636 u32 dev_flags;
637 #define DF_CONFIGURED 0x00000001
638 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
639 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
640 #define DF_USING_UDEV_PATH 0x00000008
641 #define DF_USING_ALIAS 0x00000010
642 u32 dev_port_count;
643 /* Physical device queue depth */
644 u32 queue_depth;
645 /* Used for SPC-2 reservations enforce of ISIDs */
646 u64 dev_res_bin_isid;
647 /* Pointer to transport specific device structure */
648 u32 dev_index;
649 u64 creation_time;
650 u32 num_resets;
651 u64 num_cmds;
652 u64 read_bytes;
653 u64 write_bytes;
654 spinlock_t stats_lock;
655 /* Active commands on this virtual SE device */
656 atomic_t simple_cmds;
657 atomic_t dev_ordered_id;
658 atomic_t dev_ordered_sync;
659 atomic_t dev_qf_count;
660 int export_count;
661 spinlock_t delayed_cmd_lock;
662 spinlock_t execute_task_lock;
663 spinlock_t dev_reservation_lock;
664 unsigned int dev_reservation_flags;
665 #define DRF_SPC2_RESERVATIONS 0x00000001
666 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
667 spinlock_t se_port_lock;
668 spinlock_t se_tmr_lock;
669 spinlock_t qf_cmd_lock;
670 /* Used for legacy SPC-2 reservationsa */
671 struct se_node_acl *dev_reserved_node_acl;
672 /* Used for ALUA Logical Unit Group membership */
673 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
674 /* Used for SPC-3 Persistent Reservations */
675 struct t10_pr_registration *dev_pr_res_holder;
676 struct list_head dev_sep_list;
677 struct list_head dev_tmr_list;
678 struct workqueue_struct *tmr_wq;
679 struct work_struct qf_work_queue;
680 struct list_head delayed_cmd_list;
681 struct list_head state_list;
682 struct list_head qf_cmd_list;
683 /* Pointer to associated SE HBA */
684 struct se_hba *se_hba;
685 /* T10 Inquiry and VPD WWN Information */
686 struct t10_wwn t10_wwn;
687 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
688 struct t10_alua t10_alua;
689 /* T10 SPC-2 + SPC-3 Reservations */
690 struct t10_reservation t10_pr;
691 struct se_dev_attrib dev_attrib;
692 struct config_group dev_group;
693 struct config_group dev_pr_group;
694 struct se_dev_stat_grps dev_stat_grps;
695 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
696 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
697 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
698 unsigned char udev_path[SE_UDEV_PATH_LEN];
699 /* Pointer to template of function pointers for transport */
700 struct se_subsystem_api *transport;
701 /* Linked list for struct se_hba struct se_device list */
702 struct list_head dev_list;
703 };
704
705 struct se_hba {
706 u16 hba_tpgt;
707 u32 hba_id;
708 /* See hba_flags_table */
709 u32 hba_flags;
710 /* Virtual iSCSI devices attached. */
711 u32 dev_count;
712 u32 hba_index;
713 /* Pointer to transport specific host structure. */
714 void *hba_ptr;
715 struct list_head hba_node;
716 spinlock_t device_lock;
717 struct config_group hba_group;
718 struct mutex hba_access_mutex;
719 struct se_subsystem_api *transport;
720 };
721
722 struct se_port_stat_grps {
723 struct config_group stat_group;
724 struct config_group scsi_port_group;
725 struct config_group scsi_tgt_port_group;
726 struct config_group scsi_transport_group;
727 };
728
729 struct se_lun {
730 #define SE_LUN_LINK_MAGIC 0xffff7771
731 u32 lun_link_magic;
732 /* See transport_lun_status_table */
733 enum transport_lun_status_table lun_status;
734 u32 lun_access;
735 u32 lun_flags;
736 u32 unpacked_lun;
737 atomic_t lun_acl_count;
738 spinlock_t lun_acl_lock;
739 spinlock_t lun_cmd_lock;
740 spinlock_t lun_sep_lock;
741 struct completion lun_shutdown_comp;
742 struct list_head lun_cmd_list;
743 struct list_head lun_acl_list;
744 struct se_device *lun_se_dev;
745 struct se_port *lun_sep;
746 struct config_group lun_group;
747 struct se_port_stat_grps port_stat_grps;
748 };
749
750 struct scsi_port_stats {
751 u64 cmd_pdus;
752 u64 tx_data_octets;
753 u64 rx_data_octets;
754 };
755
756 struct se_port {
757 /* RELATIVE TARGET PORT IDENTIFER */
758 u16 sep_rtpi;
759 int sep_tg_pt_secondary_stat;
760 int sep_tg_pt_secondary_write_md;
761 u32 sep_index;
762 struct scsi_port_stats sep_stats;
763 /* Used for ALUA Target Port Groups membership */
764 atomic_t sep_tg_pt_secondary_offline;
765 /* Used for PR ALL_TG_PT=1 */
766 atomic_t sep_tg_pt_ref_cnt;
767 spinlock_t sep_alua_lock;
768 struct mutex sep_tg_pt_md_mutex;
769 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
770 struct se_lun *sep_lun;
771 struct se_portal_group *sep_tpg;
772 struct list_head sep_alua_list;
773 struct list_head sep_list;
774 };
775
776 struct se_tpg_np {
777 struct se_portal_group *tpg_np_parent;
778 struct config_group tpg_np_group;
779 };
780
781 struct se_portal_group {
782 /* Type of target portal group, see transport_tpg_type_table */
783 enum transport_tpg_type_table se_tpg_type;
784 /* Number of ACLed Initiator Nodes for this TPG */
785 u32 num_node_acls;
786 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
787 atomic_t tpg_pr_ref_count;
788 /* Spinlock for adding/removing ACLed Nodes */
789 spinlock_t acl_node_lock;
790 /* Spinlock for adding/removing sessions */
791 spinlock_t session_lock;
792 spinlock_t tpg_lun_lock;
793 /* Pointer to $FABRIC_MOD portal group */
794 void *se_tpg_fabric_ptr;
795 struct list_head se_tpg_node;
796 /* linked list for initiator ACL list */
797 struct list_head acl_node_list;
798 struct se_lun **tpg_lun_list;
799 struct se_lun tpg_virt_lun0;
800 /* List of TCM sessions associated wth this TPG */
801 struct list_head tpg_sess_list;
802 /* Pointer to $FABRIC_MOD dependent code */
803 struct target_core_fabric_ops *se_tpg_tfo;
804 struct se_wwn *se_tpg_wwn;
805 struct config_group tpg_group;
806 struct config_group *tpg_default_groups[6];
807 struct config_group tpg_lun_group;
808 struct config_group tpg_np_group;
809 struct config_group tpg_acl_group;
810 struct config_group tpg_attrib_group;
811 struct config_group tpg_param_group;
812 };
813
814 struct se_wwn {
815 struct target_fabric_configfs *wwn_tf;
816 struct config_group wwn_group;
817 struct config_group *wwn_default_groups[2];
818 struct config_group fabric_stat_group;
819 };
820
821 #endif /* TARGET_CORE_BASE_H */
CRIS linux kernel tree