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Linux 4.8.3
[linux/fpc-iii.git] / include / target / target_core_base.h
blobfb8e3b6febdff7f5fdb3f0335455b9e074647c40
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 <linux/percpu_ida.h>
9 #include <linux/t10-pi.h>
10 #include <net/sock.h>
11 #include <net/tcp.h>
12
13 #define TARGET_CORE_VERSION "v5.0"
14
15 /*
16 * Maximum size of a CDB that can be stored in se_cmd without allocating
17 * memory dynamically for the CDB.
18 */
19 #define TCM_MAX_COMMAND_SIZE 32
20 /*
21 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
22 * defined 96, but the real limit is 252 (or 260 including the header)
23 */
24 #define TRANSPORT_SENSE_BUFFER 96
25 /* Used by transport_send_check_condition_and_sense() */
26 #define SPC_SENSE_KEY_OFFSET 2
27 #define SPC_ADD_SENSE_LEN_OFFSET 7
28 #define SPC_DESC_TYPE_OFFSET 8
29 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
30 #define SPC_VALIDITY_OFFSET 10
31 #define SPC_ASC_KEY_OFFSET 12
32 #define SPC_ASCQ_KEY_OFFSET 13
33 #define TRANSPORT_IQN_LEN 224
34 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
35 #define LU_GROUP_NAME_BUF 256
36 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
37 #define TG_PT_GROUP_NAME_BUF 256
38 /* Used to parse VPD into struct t10_vpd */
39 #define VPD_TMP_BUF_SIZE 254
40 /* Used by transport_generic_cmd_sequencer() */
41 #define READ_BLOCK_LEN 6
42 #define READ_CAP_LEN 8
43 #define READ_POSITION_LEN 20
44 #define INQUIRY_LEN 36
45 /* Used by transport_get_inquiry_vpd_serial() */
46 #define INQUIRY_VPD_SERIAL_LEN 254
47 /* Used by transport_get_inquiry_vpd_device_ident() */
48 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
49
50 /* Attempts before moving from SHORT to LONG */
51 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
53 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
54
55 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
56
57 /* struct se_dev_attrib sanity values */
58 /* Default max_unmap_lba_count */
59 #define DA_MAX_UNMAP_LBA_COUNT 0
60 /* Default max_unmap_block_desc_count */
61 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
62 /* Default unmap_granularity */
63 #define DA_UNMAP_GRANULARITY_DEFAULT 0
64 /* Default unmap_granularity_alignment */
65 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
66 /* Default unmap_zeroes_data */
67 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0
68 /* Default max_write_same_len, disabled by default */
69 #define DA_MAX_WRITE_SAME_LEN 0
70 /* Use a model alias based on the configfs backend device name */
71 #define DA_EMULATE_MODEL_ALIAS 0
72 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
73 #define DA_EMULATE_WRITE_CACHE 0
74 /* Emulation for UNIT ATTENTION Interlock Control */
75 #define DA_EMULATE_UA_INTLLCK_CTRL 0
76 /* Emulation for TASK_ABORTED status (TAS) by default */
77 #define DA_EMULATE_TAS 1
78 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
79 #define DA_EMULATE_TPU 0
80 /*
81 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
82 * block/blk-lib.c:blkdev_issue_discard()
83 */
84 #define DA_EMULATE_TPWS 0
85 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
86 #define DA_EMULATE_CAW 1
87 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
88 #define DA_EMULATE_3PC 1
89 /* No Emulation for PSCSI by default */
90 #define DA_EMULATE_ALUA 0
91 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
92 #define DA_ENFORCE_PR_ISIDS 1
93 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
94 #define DA_FORCE_PR_APTPL 0
95 #define DA_STATUS_MAX_SECTORS_MIN 16
96 #define DA_STATUS_MAX_SECTORS_MAX 8192
97 /* By default don't report non-rotating (solid state) medium */
98 #define DA_IS_NONROT 0
99 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
100 #define DA_EMULATE_REST_REORD 0
101
102 #define SE_INQUIRY_BUF 1024
103 #define SE_MODE_PAGE_BUF 512
104 #define SE_SENSE_BUF 96
105
106 /* struct se_hba->hba_flags */
107 enum hba_flags_table {
108 HBA_FLAGS_INTERNAL_USE = 0x01,
109 HBA_FLAGS_PSCSI_MODE = 0x02,
110 };
111
112 /* Special transport agnostic struct se_cmd->t_states */
113 enum transport_state_table {
114 TRANSPORT_NO_STATE = 0,
115 TRANSPORT_NEW_CMD = 1,
116 TRANSPORT_WRITE_PENDING = 3,
117 TRANSPORT_PROCESSING = 5,
118 TRANSPORT_COMPLETE = 6,
119 TRANSPORT_ISTATE_PROCESSING = 11,
120 TRANSPORT_COMPLETE_QF_WP = 18,
121 TRANSPORT_COMPLETE_QF_OK = 19,
122 };
123
124 /* Used for struct se_cmd->se_cmd_flags */
125 enum se_cmd_flags_table {
126 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
127 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
128 SCF_EMULATED_TASK_SENSE = 0x00000004,
129 SCF_SCSI_DATA_CDB = 0x00000008,
130 SCF_SCSI_TMR_CDB = 0x00000010,
131 SCF_FUA = 0x00000080,
132 SCF_SE_LUN_CMD = 0x00000100,
133 SCF_BIDI = 0x00000400,
134 SCF_SENT_CHECK_CONDITION = 0x00000800,
135 SCF_OVERFLOW_BIT = 0x00001000,
136 SCF_UNDERFLOW_BIT = 0x00002000,
137 SCF_SEND_DELAYED_TAS = 0x00004000,
138 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
139 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
140 SCF_COMPARE_AND_WRITE = 0x00080000,
141 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
142 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
143 SCF_ACK_KREF = 0x00400000,
144 SCF_USE_CPUID = 0x00800000,
145 SCF_TASK_ATTR_SET = 0x01000000,
146 };
147
148 /*
149 * Used by transport_send_check_condition_and_sense()
150 * to signal which ASC/ASCQ sense payload should be built.
151 */
152 typedef unsigned __bitwise__ sense_reason_t;
153
154 enum tcm_sense_reason_table {
155 #define R(x) (__force sense_reason_t )(x)
156 TCM_NO_SENSE = R(0x00),
157 TCM_NON_EXISTENT_LUN = R(0x01),
158 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
159 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
160 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
161 TCM_SERVICE_CRC_ERROR = R(0x05),
162 TCM_SNACK_REJECTED = R(0x06),
163 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
164 TCM_INVALID_CDB_FIELD = R(0x08),
165 TCM_INVALID_PARAMETER_LIST = R(0x09),
166 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
167 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
168 TCM_WRITE_PROTECTED = R(0x0c),
169 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
170 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
171 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
172 TCM_RESERVATION_CONFLICT = R(0x10),
173 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
174 TCM_OUT_OF_RESOURCES = R(0x12),
175 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
176 TCM_MISCOMPARE_VERIFY = R(0x14),
177 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
178 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
179 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
180 #undef R
181 };
182
183 enum target_sc_flags_table {
184 TARGET_SCF_BIDI_OP = 0x01,
185 TARGET_SCF_ACK_KREF = 0x02,
186 TARGET_SCF_UNKNOWN_SIZE = 0x04,
187 TARGET_SCF_USE_CPUID = 0x08,
188 };
189
190 /* fabric independent task management function values */
191 enum tcm_tmreq_table {
192 TMR_ABORT_TASK = 1,
193 TMR_ABORT_TASK_SET = 2,
194 TMR_CLEAR_ACA = 3,
195 TMR_CLEAR_TASK_SET = 4,
196 TMR_LUN_RESET = 5,
197 TMR_TARGET_WARM_RESET = 6,
198 TMR_TARGET_COLD_RESET = 7,
199 };
200
201 /* fabric independent task management response values */
202 enum tcm_tmrsp_table {
203 TMR_FUNCTION_FAILED = 0,
204 TMR_FUNCTION_COMPLETE = 1,
205 TMR_TASK_DOES_NOT_EXIST = 2,
206 TMR_LUN_DOES_NOT_EXIST = 3,
207 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
208 TMR_FUNCTION_REJECTED = 5,
209 };
210
211 /*
212 * Used for target SCSI statistics
213 */
214 typedef enum {
215 SCSI_INST_INDEX,
216 SCSI_DEVICE_INDEX,
217 SCSI_AUTH_INTR_INDEX,
218 SCSI_INDEX_TYPE_MAX
219 } scsi_index_t;
220
221 struct se_cmd;
222
223 struct t10_alua_lba_map_member {
224 struct list_head lba_map_mem_list;
225 int lba_map_mem_alua_state;
226 int lba_map_mem_alua_pg_id;
227 };
228
229 struct t10_alua_lba_map {
230 u64 lba_map_first_lba;
231 u64 lba_map_last_lba;
232 struct list_head lba_map_list;
233 struct list_head lba_map_mem_list;
234 };
235
236 struct t10_alua {
237 /* ALUA Target Port Group ID */
238 u16 alua_tg_pt_gps_counter;
239 u32 alua_tg_pt_gps_count;
240 /* Referrals support */
241 spinlock_t lba_map_lock;
242 u32 lba_map_segment_size;
243 u32 lba_map_segment_multiplier;
244 struct list_head lba_map_list;
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_supported_states;
278 int tg_pt_gp_alua_pending_state;
279 int tg_pt_gp_alua_previous_state;
280 int tg_pt_gp_alua_access_status;
281 int tg_pt_gp_alua_access_type;
282 int tg_pt_gp_nonop_delay_msecs;
283 int tg_pt_gp_trans_delay_msecs;
284 int tg_pt_gp_implicit_trans_secs;
285 int tg_pt_gp_pref;
286 int tg_pt_gp_write_metadata;
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_lun_list;
296 struct se_lun *tg_pt_gp_alua_lun;
297 struct se_node_acl *tg_pt_gp_alua_nacl;
298 struct delayed_work tg_pt_gp_transition_work;
299 struct completion *tg_pt_gp_transition_complete;
300 };
301
302 struct t10_vpd {
303 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
304 int protocol_identifier_set;
305 u32 protocol_identifier;
306 u32 device_identifier_code_set;
307 u32 association;
308 u32 device_identifier_type;
309 struct list_head vpd_list;
310 };
311
312 struct t10_wwn {
313 char vendor[8];
314 char model[16];
315 char revision[4];
316 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
317 spinlock_t t10_vpd_lock;
318 struct se_device *t10_dev;
319 struct config_group t10_wwn_group;
320 struct list_head t10_vpd_list;
321 };
322
323 struct t10_pr_registration {
324 /* Used for fabrics that contain WWN+ISID */
325 #define PR_REG_ISID_LEN 16
326 /* PR_REG_ISID_LEN + ',i,0x' */
327 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
328 char pr_reg_isid[PR_REG_ISID_LEN];
329 /* Used during APTPL metadata reading */
330 #define PR_APTPL_MAX_IPORT_LEN 256
331 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
332 /* Used during APTPL metadata reading */
333 #define PR_APTPL_MAX_TPORT_LEN 256
334 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
335 u16 pr_aptpl_rpti;
336 u16 pr_reg_tpgt;
337 /* Reservation effects all target ports */
338 int pr_reg_all_tg_pt;
339 /* Activate Persistence across Target Power Loss */
340 int pr_reg_aptpl;
341 int pr_res_holder;
342 int pr_res_type;
343 int pr_res_scope;
344 /* Used for fabric initiator WWPNs using a ISID */
345 bool isid_present_at_reg;
346 u64 pr_res_mapped_lun;
347 u64 pr_aptpl_target_lun;
348 u16 tg_pt_sep_rtpi;
349 u32 pr_res_generation;
350 u64 pr_reg_bin_isid;
351 u64 pr_res_key;
352 atomic_t pr_res_holders;
353 struct se_node_acl *pr_reg_nacl;
354 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
355 struct se_dev_entry *pr_reg_deve;
356 struct list_head pr_reg_list;
357 struct list_head pr_reg_abort_list;
358 struct list_head pr_reg_aptpl_list;
359 struct list_head pr_reg_atp_list;
360 struct list_head pr_reg_atp_mem_list;
361 };
362
363 struct t10_reservation {
364 /* Reservation effects all target ports */
365 int pr_all_tg_pt;
366 /* Activate Persistence across Target Power Loss enabled
367 * for SCSI device */
368 int pr_aptpl_active;
369 #define PR_APTPL_BUF_LEN 262144
370 u32 pr_generation;
371 spinlock_t registration_lock;
372 spinlock_t aptpl_reg_lock;
373 /*
374 * This will always be set by one individual I_T Nexus.
375 * However with all_tg_pt=1, other I_T Nexus from the
376 * same initiator can access PR reg/res info on a different
377 * target port.
378 *
379 * There is also the 'All Registrants' case, where there is
380 * a single *pr_res_holder of the reservation, but all
381 * registrations are considered reservation holders.
382 */
383 struct se_node_acl *pr_res_holder;
384 struct list_head registration_list;
385 struct list_head aptpl_reg_list;
386 };
387
388 struct se_tmr_req {
389 /* Task Management function to be performed */
390 u8 function;
391 /* Task Management response to send */
392 u8 response;
393 int call_transport;
394 /* Reference to ITT that Task Mgmt should be performed */
395 u64 ref_task_tag;
396 void *fabric_tmr_ptr;
397 struct se_cmd *task_cmd;
398 struct se_device *tmr_dev;
399 struct se_lun *tmr_lun;
400 struct list_head tmr_list;
401 };
402
403 enum target_prot_op {
404 TARGET_PROT_NORMAL = 0,
405 TARGET_PROT_DIN_INSERT = (1 << 0),
406 TARGET_PROT_DOUT_INSERT = (1 << 1),
407 TARGET_PROT_DIN_STRIP = (1 << 2),
408 TARGET_PROT_DOUT_STRIP = (1 << 3),
409 TARGET_PROT_DIN_PASS = (1 << 4),
410 TARGET_PROT_DOUT_PASS = (1 << 5),
411 };
412
413 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
414 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
415 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
416
417 enum target_prot_type {
418 TARGET_DIF_TYPE0_PROT,
419 TARGET_DIF_TYPE1_PROT,
420 TARGET_DIF_TYPE2_PROT,
421 TARGET_DIF_TYPE3_PROT,
422 };
423
424 enum target_core_dif_check {
425 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
426 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
427 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
428 };
429
430 /* for sam_task_attr */
431 #define TCM_SIMPLE_TAG 0x20
432 #define TCM_HEAD_TAG 0x21
433 #define TCM_ORDERED_TAG 0x22
434 #define TCM_ACA_TAG 0x24
435
436 struct se_cmd {
437 /* SAM response code being sent to initiator */
438 u8 scsi_status;
439 u8 scsi_asc;
440 u8 scsi_ascq;
441 u16 scsi_sense_length;
442 unsigned cmd_wait_set:1;
443 unsigned unknown_data_length:1;
444 bool state_active:1;
445 u64 tag; /* SAM command identifier aka task tag */
446 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
447 int alua_nonop_delay;
448 /* See include/linux/dma-mapping.h */
449 enum dma_data_direction data_direction;
450 /* For SAM Task Attribute */
451 int sam_task_attr;
452 /* Used for se_sess->sess_tag_pool */
453 unsigned int map_tag;
454 /* Transport protocol dependent state, see transport_state_table */
455 enum transport_state_table t_state;
456 /* See se_cmd_flags_table */
457 u32 se_cmd_flags;
458 /* Total size in bytes associated with command */
459 u32 data_length;
460 u32 residual_count;
461 u64 orig_fe_lun;
462 /* Persistent Reservation key */
463 u64 pr_res_key;
464 /* Used for sense data */
465 void *sense_buffer;
466 struct list_head se_delayed_node;
467 struct list_head se_qf_node;
468 struct se_device *se_dev;
469 struct se_lun *se_lun;
470 /* Only used for internal passthrough and legacy TCM fabric modules */
471 struct se_session *se_sess;
472 struct se_tmr_req *se_tmr_req;
473 struct list_head se_cmd_list;
474 struct completion cmd_wait_comp;
475 const struct target_core_fabric_ops *se_tfo;
476 sense_reason_t (*execute_cmd)(struct se_cmd *);
477 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
478 void *protocol_data;
479
480 unsigned char *t_task_cdb;
481 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
482 unsigned long long t_task_lba;
483 unsigned int t_task_nolb;
484 unsigned int transport_state;
485 #define CMD_T_ABORTED (1 << 0)
486 #define CMD_T_ACTIVE (1 << 1)
487 #define CMD_T_COMPLETE (1 << 2)
488 #define CMD_T_SENT (1 << 4)
489 #define CMD_T_STOP (1 << 5)
490 #define CMD_T_DEV_ACTIVE (1 << 7)
491 #define CMD_T_BUSY (1 << 9)
492 #define CMD_T_TAS (1 << 10)
493 #define CMD_T_FABRIC_STOP (1 << 11)
494 spinlock_t t_state_lock;
495 struct kref cmd_kref;
496 struct completion t_transport_stop_comp;
497
498 struct work_struct work;
499
500 struct scatterlist *t_data_sg;
501 struct scatterlist *t_data_sg_orig;
502 unsigned int t_data_nents;
503 unsigned int t_data_nents_orig;
504 void *t_data_vmap;
505 struct scatterlist *t_bidi_data_sg;
506 unsigned int t_bidi_data_nents;
507
508 /* Used for lun->lun_ref counting */
509 int lun_ref_active;
510
511 struct list_head state_list;
512
513 /* backend private data */
514 void *priv;
515
516 /* DIF related members */
517 enum target_prot_op prot_op;
518 enum target_prot_type prot_type;
519 u8 prot_checks;
520 bool prot_pto;
521 u32 prot_length;
522 u32 reftag_seed;
523 struct scatterlist *t_prot_sg;
524 unsigned int t_prot_nents;
525 sense_reason_t pi_err;
526 sector_t bad_sector;
527 int cpuid;
528 };
529
530 struct se_ua {
531 u8 ua_asc;
532 u8 ua_ascq;
533 struct list_head ua_nacl_list;
534 };
535
536 struct se_node_acl {
537 char initiatorname[TRANSPORT_IQN_LEN];
538 /* Used to signal demo mode created ACL, disabled by default */
539 bool dynamic_node_acl;
540 u32 queue_depth;
541 u32 acl_index;
542 enum target_prot_type saved_prot_type;
543 #define MAX_ACL_TAG_SIZE 64
544 char acl_tag[MAX_ACL_TAG_SIZE];
545 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
546 atomic_t acl_pr_ref_count;
547 struct hlist_head lun_entry_hlist;
548 struct se_session *nacl_sess;
549 struct se_portal_group *se_tpg;
550 struct mutex lun_entry_mutex;
551 spinlock_t nacl_sess_lock;
552 struct config_group acl_group;
553 struct config_group acl_attrib_group;
554 struct config_group acl_auth_group;
555 struct config_group acl_param_group;
556 struct config_group acl_fabric_stat_group;
557 struct list_head acl_list;
558 struct list_head acl_sess_list;
559 struct completion acl_free_comp;
560 struct kref acl_kref;
561 };
562
563 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
564 {
565 return container_of(to_config_group(item), struct se_node_acl,
566 acl_group);
567 }
568
569 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
570 {
571 return container_of(to_config_group(item), struct se_node_acl,
572 acl_attrib_group);
573 }
574
575 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
576 {
577 return container_of(to_config_group(item), struct se_node_acl,
578 acl_auth_group);
579 }
580
581 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
582 {
583 return container_of(to_config_group(item), struct se_node_acl,
584 acl_param_group);
585 }
586
587 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
588 {
589 return container_of(to_config_group(item), struct se_node_acl,
590 acl_fabric_stat_group);
591 }
592
593 struct se_session {
594 unsigned sess_tearing_down:1;
595 u64 sess_bin_isid;
596 enum target_prot_op sup_prot_ops;
597 enum target_prot_type sess_prot_type;
598 struct se_node_acl *se_node_acl;
599 struct se_portal_group *se_tpg;
600 void *fabric_sess_ptr;
601 struct list_head sess_list;
602 struct list_head sess_acl_list;
603 struct list_head sess_cmd_list;
604 struct list_head sess_wait_list;
605 spinlock_t sess_cmd_lock;
606 void *sess_cmd_map;
607 struct percpu_ida sess_tag_pool;
608 };
609
610 struct se_device;
611 struct se_transform_info;
612 struct scatterlist;
613
614 struct se_ml_stat_grps {
615 struct config_group stat_group;
616 struct config_group scsi_auth_intr_group;
617 struct config_group scsi_att_intr_port_group;
618 };
619
620 struct se_lun_acl {
621 u64 mapped_lun;
622 struct se_node_acl *se_lun_nacl;
623 struct se_lun *se_lun;
624 struct config_group se_lun_group;
625 struct se_ml_stat_grps ml_stat_grps;
626 };
627
628 struct se_dev_entry {
629 u64 mapped_lun;
630 u64 pr_res_key;
631 u64 creation_time;
632 bool lun_access_ro;
633 u32 attach_count;
634 atomic_long_t total_cmds;
635 atomic_long_t read_bytes;
636 atomic_long_t write_bytes;
637 atomic_t ua_count;
638 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
639 struct kref pr_kref;
640 struct completion pr_comp;
641 struct se_lun_acl __rcu *se_lun_acl;
642 spinlock_t ua_lock;
643 struct se_lun __rcu *se_lun;
644 #define DEF_PR_REG_ACTIVE 1
645 unsigned long deve_flags;
646 struct list_head alua_port_list;
647 struct list_head lun_link;
648 struct list_head ua_list;
649 struct hlist_node link;
650 struct rcu_head rcu_head;
651 };
652
653 struct se_dev_attrib {
654 int emulate_model_alias;
655 int emulate_dpo;
656 int emulate_fua_write;
657 int emulate_fua_read;
658 int emulate_write_cache;
659 int emulate_ua_intlck_ctrl;
660 int emulate_tas;
661 int emulate_tpu;
662 int emulate_tpws;
663 int emulate_caw;
664 int emulate_3pc;
665 int pi_prot_format;
666 enum target_prot_type pi_prot_type;
667 enum target_prot_type hw_pi_prot_type;
668 int enforce_pr_isids;
669 int force_pr_aptpl;
670 int is_nonrot;
671 int emulate_rest_reord;
672 int unmap_zeroes_data;
673 u32 hw_block_size;
674 u32 block_size;
675 u32 hw_max_sectors;
676 u32 optimal_sectors;
677 u32 hw_queue_depth;
678 u32 queue_depth;
679 u32 max_unmap_lba_count;
680 u32 max_unmap_block_desc_count;
681 u32 unmap_granularity;
682 u32 unmap_granularity_alignment;
683 u32 max_write_same_len;
684 u32 max_bytes_per_io;
685 struct se_device *da_dev;
686 struct config_group da_group;
687 };
688
689 struct se_port_stat_grps {
690 struct config_group stat_group;
691 struct config_group scsi_port_group;
692 struct config_group scsi_tgt_port_group;
693 struct config_group scsi_transport_group;
694 };
695
696 struct scsi_port_stats {
697 atomic_long_t cmd_pdus;
698 atomic_long_t tx_data_octets;
699 atomic_long_t rx_data_octets;
700 };
701
702 struct se_lun {
703 u64 unpacked_lun;
704 #define SE_LUN_LINK_MAGIC 0xffff7771
705 u32 lun_link_magic;
706 bool lun_access_ro;
707 u32 lun_index;
708
709 /* RELATIVE TARGET PORT IDENTIFER */
710 u16 lun_rtpi;
711 atomic_t lun_acl_count;
712 struct se_device __rcu *lun_se_dev;
713
714 struct list_head lun_deve_list;
715 spinlock_t lun_deve_lock;
716
717 /* ALUA state */
718 int lun_tg_pt_secondary_stat;
719 int lun_tg_pt_secondary_write_md;
720 atomic_t lun_tg_pt_secondary_offline;
721 struct mutex lun_tg_pt_md_mutex;
722
723 /* ALUA target port group linkage */
724 struct list_head lun_tg_pt_gp_link;
725 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
726 spinlock_t lun_tg_pt_gp_lock;
727
728 struct se_portal_group *lun_tpg;
729 struct scsi_port_stats lun_stats;
730 struct config_group lun_group;
731 struct se_port_stat_grps port_stat_grps;
732 struct completion lun_ref_comp;
733 struct percpu_ref lun_ref;
734 struct list_head lun_dev_link;
735 struct hlist_node link;
736 struct rcu_head rcu_head;
737 };
738
739 struct se_dev_stat_grps {
740 struct config_group stat_group;
741 struct config_group scsi_dev_group;
742 struct config_group scsi_tgt_dev_group;
743 struct config_group scsi_lu_group;
744 };
745
746 struct se_device {
747 #define SE_DEV_LINK_MAGIC 0xfeeddeef
748 u32 dev_link_magic;
749 /* RELATIVE TARGET PORT IDENTIFER Counter */
750 u16 dev_rpti_counter;
751 /* Used for SAM Task Attribute ordering */
752 u32 dev_cur_ordered_id;
753 u32 dev_flags;
754 #define DF_CONFIGURED 0x00000001
755 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
756 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
757 #define DF_USING_UDEV_PATH 0x00000008
758 #define DF_USING_ALIAS 0x00000010
759 #define DF_READ_ONLY 0x00000020
760 /* Physical device queue depth */
761 u32 queue_depth;
762 /* Used for SPC-2 reservations enforce of ISIDs */
763 u64 dev_res_bin_isid;
764 /* Pointer to transport specific device structure */
765 u32 dev_index;
766 u64 creation_time;
767 atomic_long_t num_resets;
768 atomic_long_t num_cmds;
769 atomic_long_t read_bytes;
770 atomic_long_t write_bytes;
771 /* Active commands on this virtual SE device */
772 atomic_t simple_cmds;
773 atomic_t dev_ordered_sync;
774 atomic_t dev_qf_count;
775 u32 export_count;
776 spinlock_t delayed_cmd_lock;
777 spinlock_t execute_task_lock;
778 spinlock_t dev_reservation_lock;
779 unsigned int dev_reservation_flags;
780 #define DRF_SPC2_RESERVATIONS 0x00000001
781 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
782 spinlock_t se_port_lock;
783 spinlock_t se_tmr_lock;
784 spinlock_t qf_cmd_lock;
785 struct semaphore caw_sem;
786 /* Used for legacy SPC-2 reservationsa */
787 struct se_node_acl *dev_reserved_node_acl;
788 /* Used for ALUA Logical Unit Group membership */
789 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
790 /* Used for SPC-3 Persistent Reservations */
791 struct t10_pr_registration *dev_pr_res_holder;
792 struct list_head dev_sep_list;
793 struct list_head dev_tmr_list;
794 struct workqueue_struct *tmr_wq;
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 struct list_head g_dev_node;
800 /* Pointer to associated SE HBA */
801 struct se_hba *se_hba;
802 /* T10 Inquiry and VPD WWN Information */
803 struct t10_wwn t10_wwn;
804 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
805 struct t10_alua t10_alua;
806 /* T10 SPC-2 + SPC-3 Reservations */
807 struct t10_reservation t10_pr;
808 struct se_dev_attrib dev_attrib;
809 struct config_group dev_group;
810 struct config_group dev_pr_group;
811 struct se_dev_stat_grps dev_stat_grps;
812 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
813 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
814 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
815 unsigned char udev_path[SE_UDEV_PATH_LEN];
816 /* Pointer to template of function pointers for transport */
817 const struct target_backend_ops *transport;
818 /* Linked list for struct se_hba struct se_device list */
819 struct list_head dev_list;
820 struct se_lun xcopy_lun;
821 /* Protection Information */
822 int prot_length;
823 /* For se_lun->lun_se_dev RCU read-side critical access */
824 u32 hba_index;
825 struct rcu_head rcu_head;
826 };
827
828 struct se_hba {
829 u16 hba_tpgt;
830 u32 hba_id;
831 /* See hba_flags_table */
832 u32 hba_flags;
833 /* Virtual iSCSI devices attached. */
834 u32 dev_count;
835 u32 hba_index;
836 /* Pointer to transport specific host structure. */
837 void *hba_ptr;
838 struct list_head hba_node;
839 spinlock_t device_lock;
840 struct config_group hba_group;
841 struct mutex hba_access_mutex;
842 struct target_backend *backend;
843 };
844
845 struct se_tpg_np {
846 struct se_portal_group *tpg_np_parent;
847 struct config_group tpg_np_group;
848 };
849
850 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
851 {
852 return container_of(to_config_group(item), struct se_tpg_np,
853 tpg_np_group);
854 }
855
856 struct se_portal_group {
857 /*
858 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
859 *
860 * Negative values can be used by fabric drivers for internal use TPGs.
861 */
862 int proto_id;
863 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
864 atomic_t tpg_pr_ref_count;
865 /* Spinlock for adding/removing ACLed Nodes */
866 struct mutex acl_node_mutex;
867 /* Spinlock for adding/removing sessions */
868 spinlock_t session_lock;
869 struct mutex tpg_lun_mutex;
870 struct list_head se_tpg_node;
871 /* linked list for initiator ACL list */
872 struct list_head acl_node_list;
873 struct hlist_head tpg_lun_hlist;
874 struct se_lun *tpg_virt_lun0;
875 /* List of TCM sessions associated wth this TPG */
876 struct list_head tpg_sess_list;
877 /* Pointer to $FABRIC_MOD dependent code */
878 const struct target_core_fabric_ops *se_tpg_tfo;
879 struct se_wwn *se_tpg_wwn;
880 struct config_group tpg_group;
881 struct config_group tpg_lun_group;
882 struct config_group tpg_np_group;
883 struct config_group tpg_acl_group;
884 struct config_group tpg_attrib_group;
885 struct config_group tpg_auth_group;
886 struct config_group tpg_param_group;
887 };
888
889 static inline struct se_portal_group *to_tpg(struct config_item *item)
890 {
891 return container_of(to_config_group(item), struct se_portal_group,
892 tpg_group);
893 }
894
895 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
896 {
897 return container_of(to_config_group(item), struct se_portal_group,
898 tpg_attrib_group);
899 }
900
901 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
902 {
903 return container_of(to_config_group(item), struct se_portal_group,
904 tpg_auth_group);
905 }
906
907 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
908 {
909 return container_of(to_config_group(item), struct se_portal_group,
910 tpg_param_group);
911 }
912
913 struct se_wwn {
914 struct target_fabric_configfs *wwn_tf;
915 struct config_group wwn_group;
916 struct config_group fabric_stat_group;
917 };
918
919 static inline void atomic_inc_mb(atomic_t *v)
920 {
921 smp_mb__before_atomic();
922 atomic_inc(v);
923 smp_mb__after_atomic();
924 }
925
926 static inline void atomic_dec_mb(atomic_t *v)
927 {
928 smp_mb__before_atomic();
929 atomic_dec(v);
930 smp_mb__after_atomic();
931 }
932
933 #endif /* TARGET_CORE_BASE_H */
Linux with added FPC-III support