1 #ifndef TARGET_CORE_BASE_H 2 #define TARGET_CORE_BASE_H 3 4 #include <linux/configfs.h> /* struct config_group */ 5 #include <linux/dma-direction.h> /* enum dma_data_direction */ 6 #include <linux/percpu_ida.h> /* struct percpu_ida */ 7 #include <linux/percpu-refcount.h> 8 #include <linux/semaphore.h> /* struct semaphore */ 9 #include <linux/completion.h> 10 11 #define TARGET_CORE_VERSION "v5.0" 12 13 /* 14 * Maximum size of a CDB that can be stored in se_cmd without allocating 15 * memory dynamically for the CDB. 16 */ 17 #define TCM_MAX_COMMAND_SIZE 32 18 /* 19 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently 20 * defined 96, but the real limit is 252 (or 260 including the header) 21 */ 22 #define TRANSPORT_SENSE_BUFFER 96 23 /* Used by transport_send_check_condition_and_sense() */ 24 #define SPC_SENSE_KEY_OFFSET 2 25 #define SPC_ADD_SENSE_LEN_OFFSET 7 26 #define SPC_DESC_TYPE_OFFSET 8 27 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9 28 #define SPC_VALIDITY_OFFSET 10 29 #define SPC_ASC_KEY_OFFSET 12 30 #define SPC_ASCQ_KEY_OFFSET 13 31 #define TRANSPORT_IQN_LEN 224 32 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ 33 #define LU_GROUP_NAME_BUF 256 34 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ 35 #define TG_PT_GROUP_NAME_BUF 256 36 /* Used to parse VPD into struct t10_vpd */ 37 #define VPD_TMP_BUF_SIZE 254 38 /* Used by transport_generic_cmd_sequencer() */ 39 #define READ_BLOCK_LEN 6 40 #define READ_CAP_LEN 8 41 #define READ_POSITION_LEN 20 42 #define INQUIRY_LEN 36 43 /* Used by transport_get_inquiry_vpd_serial() */ 44 #define INQUIRY_VPD_SERIAL_LEN 254 45 /* Used by transport_get_inquiry_vpd_device_ident() */ 46 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 47 48 /* Attempts before moving from SHORT to LONG */ 49 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 50 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ 51 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ 52 53 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ 54 55 /* struct se_dev_attrib sanity values */ 56 /* Default max_unmap_lba_count */ 57 #define DA_MAX_UNMAP_LBA_COUNT 0 58 /* Default max_unmap_block_desc_count */ 59 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 60 /* Default unmap_granularity */ 61 #define DA_UNMAP_GRANULARITY_DEFAULT 0 62 /* Default unmap_granularity_alignment */ 63 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 64 /* Default unmap_zeroes_data */ 65 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0 66 /* Default max_write_same_len, disabled by default */ 67 #define DA_MAX_WRITE_SAME_LEN 0 68 /* Use a model alias based on the configfs backend device name */ 69 #define DA_EMULATE_MODEL_ALIAS 0 70 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 71 #define DA_EMULATE_WRITE_CACHE 0 72 /* Emulation for UNIT ATTENTION Interlock Control */ 73 #define DA_EMULATE_UA_INTLLCK_CTRL 0 74 /* Emulation for TASK_ABORTED status (TAS) by default */ 75 #define DA_EMULATE_TAS 1 76 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 77 #define DA_EMULATE_TPU 0 78 /* 79 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 80 * block/blk-lib.c:blkdev_issue_discard() 81 */ 82 #define DA_EMULATE_TPWS 0 83 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */ 84 #define DA_EMULATE_CAW 1 85 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */ 86 #define DA_EMULATE_3PC 1 87 /* No Emulation for PSCSI by default */ 88 #define DA_EMULATE_ALUA 0 89 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 90 #define DA_ENFORCE_PR_ISIDS 1 91 /* Force SPC-3 PR Activate Persistence across Target Power Loss */ 92 #define DA_FORCE_PR_APTPL 0 93 #define DA_STATUS_MAX_SECTORS_MIN 16 94 #define DA_STATUS_MAX_SECTORS_MAX 8192 95 /* By default don't report non-rotating (solid state) medium */ 96 #define DA_IS_NONROT 0 97 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 98 #define DA_EMULATE_REST_REORD 0 99 100 #define SE_INQUIRY_BUF 1024 101 #define SE_MODE_PAGE_BUF 512 102 #define SE_SENSE_BUF 96 103 104 /* struct se_hba->hba_flags */ 105 enum hba_flags_table { 106 HBA_FLAGS_INTERNAL_USE = 0x01, 107 HBA_FLAGS_PSCSI_MODE = 0x02, 108 }; 109 110 /* Special transport agnostic struct se_cmd->t_states */ 111 enum transport_state_table { 112 TRANSPORT_NO_STATE = 0, 113 TRANSPORT_NEW_CMD = 1, 114 TRANSPORT_WRITE_PENDING = 3, 115 TRANSPORT_PROCESSING = 5, 116 TRANSPORT_COMPLETE = 6, 117 TRANSPORT_ISTATE_PROCESSING = 11, 118 TRANSPORT_COMPLETE_QF_WP = 18, 119 TRANSPORT_COMPLETE_QF_OK = 19, 120 TRANSPORT_COMPLETE_QF_ERR = 20, 121 }; 122 123 /* Used for struct se_cmd->se_cmd_flags */ 124 enum se_cmd_flags_table { 125 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 126 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 127 SCF_EMULATED_TASK_SENSE = 0x00000004, 128 SCF_SCSI_DATA_CDB = 0x00000008, 129 SCF_SCSI_TMR_CDB = 0x00000010, 130 SCF_FUA = 0x00000080, 131 SCF_SE_LUN_CMD = 0x00000100, 132 SCF_BIDI = 0x00000400, 133 SCF_SENT_CHECK_CONDITION = 0x00000800, 134 SCF_OVERFLOW_BIT = 0x00001000, 135 SCF_UNDERFLOW_BIT = 0x00002000, 136 SCF_SEND_DELAYED_TAS = 0x00004000, 137 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 138 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 139 SCF_COMPARE_AND_WRITE = 0x00080000, 140 SCF_COMPARE_AND_WRITE_POST = 0x00100000, 141 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000, 142 SCF_ACK_KREF = 0x00400000, 143 SCF_USE_CPUID = 0x00800000, 144 SCF_TASK_ATTR_SET = 0x01000000, 145 }; 146 147 /* 148 * Used by transport_send_check_condition_and_sense() 149 * to signal which ASC/ASCQ sense payload should be built. 150 */ 151 typedef unsigned __bitwise sense_reason_t; 152 153 enum tcm_sense_reason_table { 154 #define R(x) (__force sense_reason_t )(x) 155 TCM_NO_SENSE = R(0x00), 156 TCM_NON_EXISTENT_LUN = R(0x01), 157 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 158 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 159 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 160 TCM_SERVICE_CRC_ERROR = R(0x05), 161 TCM_SNACK_REJECTED = R(0x06), 162 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 163 TCM_INVALID_CDB_FIELD = R(0x08), 164 TCM_INVALID_PARAMETER_LIST = R(0x09), 165 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 166 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 167 TCM_WRITE_PROTECTED = R(0x0c), 168 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 169 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 170 TCM_CHECK_CONDITION_NOT_READY = R(0x0f), 171 TCM_RESERVATION_CONFLICT = R(0x10), 172 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 173 TCM_OUT_OF_RESOURCES = R(0x12), 174 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 175 TCM_MISCOMPARE_VERIFY = R(0x14), 176 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 177 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 178 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 179 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18), 180 TCM_TOO_MANY_TARGET_DESCS = R(0x19), 181 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a), 182 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b), 183 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c), 184 #undef R 185 }; 186 187 enum target_sc_flags_table { 188 TARGET_SCF_BIDI_OP = 0x01, 189 TARGET_SCF_ACK_KREF = 0x02, 190 TARGET_SCF_UNKNOWN_SIZE = 0x04, 191 TARGET_SCF_USE_CPUID = 0x08, 192 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10, 193 }; 194 195 /* fabric independent task management function values */ 196 enum tcm_tmreq_table { 197 TMR_ABORT_TASK = 1, 198 TMR_ABORT_TASK_SET = 2, 199 TMR_CLEAR_ACA = 3, 200 TMR_CLEAR_TASK_SET = 4, 201 TMR_LUN_RESET = 5, 202 TMR_TARGET_WARM_RESET = 6, 203 TMR_TARGET_COLD_RESET = 7, 204 TMR_UNKNOWN = 0xff, 205 }; 206 207 /* fabric independent task management response values */ 208 enum tcm_tmrsp_table { 209 TMR_FUNCTION_FAILED = 0, 210 TMR_FUNCTION_COMPLETE = 1, 211 TMR_TASK_DOES_NOT_EXIST = 2, 212 TMR_LUN_DOES_NOT_EXIST = 3, 213 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, 214 TMR_FUNCTION_REJECTED = 5, 215 }; 216 217 /* 218 * Used for target SCSI statistics 219 */ 220 typedef enum { 221 SCSI_INST_INDEX, 222 SCSI_AUTH_INTR_INDEX, 223 SCSI_INDEX_TYPE_MAX 224 } scsi_index_t; 225 226 struct se_cmd; 227 228 struct t10_alua_lba_map_member { 229 struct list_head lba_map_mem_list; 230 int lba_map_mem_alua_state; 231 int lba_map_mem_alua_pg_id; 232 }; 233 234 struct t10_alua_lba_map { 235 u64 lba_map_first_lba; 236 u64 lba_map_last_lba; 237 struct list_head lba_map_list; 238 struct list_head lba_map_mem_list; 239 }; 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 /* Referrals support */ 246 spinlock_t lba_map_lock; 247 u32 lba_map_segment_size; 248 u32 lba_map_segment_multiplier; 249 struct list_head lba_map_list; 250 spinlock_t tg_pt_gps_lock; 251 struct se_device *t10_dev; 252 /* Used for default ALUA Target Port Group */ 253 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 254 /* Used for default ALUA Target Port Group ConfigFS group */ 255 struct config_group alua_tg_pt_gps_group; 256 struct list_head tg_pt_gps_list; 257 }; 258 259 struct t10_alua_lu_gp { 260 u16 lu_gp_id; 261 int lu_gp_valid_id; 262 u32 lu_gp_members; 263 atomic_t lu_gp_ref_cnt; 264 spinlock_t lu_gp_lock; 265 struct config_group lu_gp_group; 266 struct list_head lu_gp_node; 267 struct list_head lu_gp_mem_list; 268 }; 269 270 struct t10_alua_lu_gp_member { 271 bool lu_gp_assoc; 272 atomic_t lu_gp_mem_ref_cnt; 273 spinlock_t lu_gp_mem_lock; 274 struct t10_alua_lu_gp *lu_gp; 275 struct se_device *lu_gp_mem_dev; 276 struct list_head lu_gp_mem_list; 277 }; 278 279 struct t10_alua_tg_pt_gp { 280 u16 tg_pt_gp_id; 281 int tg_pt_gp_valid_id; 282 int tg_pt_gp_alua_supported_states; 283 int tg_pt_gp_alua_access_status; 284 int tg_pt_gp_alua_access_type; 285 int tg_pt_gp_nonop_delay_msecs; 286 int tg_pt_gp_trans_delay_msecs; 287 int tg_pt_gp_implicit_trans_secs; 288 int tg_pt_gp_pref; 289 int tg_pt_gp_write_metadata; 290 u32 tg_pt_gp_members; 291 int tg_pt_gp_alua_access_state; 292 atomic_t tg_pt_gp_ref_cnt; 293 spinlock_t tg_pt_gp_lock; 294 struct mutex tg_pt_gp_transition_mutex; 295 struct se_device *tg_pt_gp_dev; 296 struct config_group tg_pt_gp_group; 297 struct list_head tg_pt_gp_list; 298 struct list_head tg_pt_gp_lun_list; 299 struct se_lun *tg_pt_gp_alua_lun; 300 struct se_node_acl *tg_pt_gp_alua_nacl; 301 }; 302 303 struct t10_vpd { 304 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 305 int protocol_identifier_set; 306 u32 protocol_identifier; 307 u32 device_identifier_code_set; 308 u32 association; 309 u32 device_identifier_type; 310 struct list_head vpd_list; 311 }; 312 313 struct t10_wwn { 314 char vendor[8]; 315 char model[16]; 316 char revision[4]; 317 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 318 spinlock_t t10_vpd_lock; 319 struct se_device *t10_dev; 320 struct config_group t10_wwn_group; 321 struct list_head t10_vpd_list; 322 }; 323 324 struct t10_pr_registration { 325 /* Used for fabrics that contain WWN+ISID */ 326 #define PR_REG_ISID_LEN 16 327 /* PR_REG_ISID_LEN + ',i,0x' */ 328 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 329 char pr_reg_isid[PR_REG_ISID_LEN]; 330 /* Used during APTPL metadata reading */ 331 #define PR_APTPL_MAX_IPORT_LEN 256 332 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 333 /* Used during APTPL metadata reading */ 334 #define PR_APTPL_MAX_TPORT_LEN 256 335 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 336 u16 pr_aptpl_rpti; 337 u16 pr_reg_tpgt; 338 /* Reservation effects all target ports */ 339 int pr_reg_all_tg_pt; 340 /* Activate Persistence across Target Power Loss */ 341 int pr_reg_aptpl; 342 int pr_res_holder; 343 int pr_res_type; 344 int pr_res_scope; 345 /* Used for fabric initiator WWPNs using a ISID */ 346 bool isid_present_at_reg; 347 u64 pr_res_mapped_lun; 348 u64 pr_aptpl_target_lun; 349 u16 tg_pt_sep_rtpi; 350 u32 pr_res_generation; 351 u64 pr_reg_bin_isid; 352 u64 pr_res_key; 353 atomic_t pr_res_holders; 354 struct se_node_acl *pr_reg_nacl; 355 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */ 356 struct se_dev_entry *pr_reg_deve; 357 struct list_head pr_reg_list; 358 struct list_head pr_reg_abort_list; 359 struct list_head pr_reg_aptpl_list; 360 struct list_head pr_reg_atp_list; 361 struct list_head pr_reg_atp_mem_list; 362 }; 363 364 struct t10_reservation { 365 /* Reservation effects all target ports */ 366 int pr_all_tg_pt; 367 /* Activate Persistence across Target Power Loss enabled 368 * for SCSI device */ 369 int pr_aptpl_active; 370 #define PR_APTPL_BUF_LEN 262144 371 u32 pr_generation; 372 spinlock_t registration_lock; 373 spinlock_t aptpl_reg_lock; 374 /* 375 * This will always be set by one individual I_T Nexus. 376 * However with all_tg_pt=1, other I_T Nexus from the 377 * same initiator can access PR reg/res info on a different 378 * target port. 379 * 380 * There is also the 'All Registrants' case, where there is 381 * a single *pr_res_holder of the reservation, but all 382 * registrations are considered reservation holders. 383 */ 384 struct se_node_acl *pr_res_holder; 385 struct list_head registration_list; 386 struct list_head aptpl_reg_list; 387 }; 388 389 struct se_tmr_req { 390 /* Task Management function to be performed */ 391 u8 function; 392 /* Task Management response to send */ 393 u8 response; 394 int call_transport; 395 /* Reference to ITT that Task Mgmt should be performed */ 396 u64 ref_task_tag; 397 void *fabric_tmr_ptr; 398 struct se_cmd *task_cmd; 399 struct se_device *tmr_dev; 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_TAS (1 << 10) 491 #define CMD_T_FABRIC_STOP (1 << 11) 492 spinlock_t t_state_lock; 493 struct kref cmd_kref; 494 struct completion t_transport_stop_comp; 495 496 struct work_struct work; 497 498 struct scatterlist *t_data_sg; 499 struct scatterlist *t_data_sg_orig; 500 unsigned int t_data_nents; 501 unsigned int t_data_nents_orig; 502 void *t_data_vmap; 503 struct scatterlist *t_bidi_data_sg; 504 unsigned int t_bidi_data_nents; 505 506 /* Used for lun->lun_ref counting */ 507 int lun_ref_active; 508 509 struct list_head state_list; 510 511 /* backend private data */ 512 void *priv; 513 514 /* DIF related members */ 515 enum target_prot_op prot_op; 516 enum target_prot_type prot_type; 517 u8 prot_checks; 518 bool prot_pto; 519 u32 prot_length; 520 u32 reftag_seed; 521 struct scatterlist *t_prot_sg; 522 unsigned int t_prot_nents; 523 sense_reason_t pi_err; 524 sector_t bad_sector; 525 int cpuid; 526 }; 527 528 struct se_ua { 529 u8 ua_asc; 530 u8 ua_ascq; 531 struct list_head ua_nacl_list; 532 }; 533 534 struct se_node_acl { 535 char initiatorname[TRANSPORT_IQN_LEN]; 536 /* Used to signal demo mode created ACL, disabled by default */ 537 bool dynamic_node_acl; 538 bool dynamic_stop; 539 u32 queue_depth; 540 u32 acl_index; 541 enum target_prot_type saved_prot_type; 542 #define MAX_ACL_TAG_SIZE 64 543 char acl_tag[MAX_ACL_TAG_SIZE]; 544 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 545 atomic_t acl_pr_ref_count; 546 struct hlist_head lun_entry_hlist; 547 struct se_session *nacl_sess; 548 struct se_portal_group *se_tpg; 549 struct mutex lun_entry_mutex; 550 spinlock_t nacl_sess_lock; 551 struct config_group acl_group; 552 struct config_group acl_attrib_group; 553 struct config_group acl_auth_group; 554 struct config_group acl_param_group; 555 struct config_group acl_fabric_stat_group; 556 struct list_head acl_list; 557 struct list_head acl_sess_list; 558 struct completion acl_free_comp; 559 struct kref acl_kref; 560 }; 561 562 static inline struct se_node_acl *acl_to_nacl(struct config_item *item) 563 { 564 return container_of(to_config_group(item), struct se_node_acl, 565 acl_group); 566 } 567 568 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item) 569 { 570 return container_of(to_config_group(item), struct se_node_acl, 571 acl_attrib_group); 572 } 573 574 static inline struct se_node_acl *auth_to_nacl(struct config_item *item) 575 { 576 return container_of(to_config_group(item), struct se_node_acl, 577 acl_auth_group); 578 } 579 580 static inline struct se_node_acl *param_to_nacl(struct config_item *item) 581 { 582 return container_of(to_config_group(item), struct se_node_acl, 583 acl_param_group); 584 } 585 586 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item) 587 { 588 return container_of(to_config_group(item), struct se_node_acl, 589 acl_fabric_stat_group); 590 } 591 592 struct se_session { 593 unsigned sess_tearing_down:1; 594 u64 sess_bin_isid; 595 enum target_prot_op sup_prot_ops; 596 enum target_prot_type sess_prot_type; 597 struct se_node_acl *se_node_acl; 598 struct se_portal_group *se_tpg; 599 void *fabric_sess_ptr; 600 struct list_head sess_list; 601 struct list_head sess_acl_list; 602 struct list_head sess_cmd_list; 603 struct list_head sess_wait_list; 604 spinlock_t sess_cmd_lock; 605 void *sess_cmd_map; 606 struct percpu_ida sess_tag_pool; 607 }; 608 609 struct se_device; 610 struct se_transform_info; 611 struct scatterlist; 612 613 struct se_ml_stat_grps { 614 struct config_group stat_group; 615 struct config_group scsi_auth_intr_group; 616 struct config_group scsi_att_intr_port_group; 617 }; 618 619 struct se_lun_acl { 620 u64 mapped_lun; 621 struct se_node_acl *se_lun_nacl; 622 struct se_lun *se_lun; 623 struct config_group se_lun_group; 624 struct se_ml_stat_grps ml_stat_grps; 625 }; 626 627 struct se_dev_entry { 628 u64 mapped_lun; 629 u64 pr_res_key; 630 u64 creation_time; 631 bool lun_access_ro; 632 u32 attach_count; 633 atomic_long_t total_cmds; 634 atomic_long_t read_bytes; 635 atomic_long_t write_bytes; 636 atomic_t ua_count; 637 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 638 struct kref pr_kref; 639 struct completion pr_comp; 640 struct se_lun_acl __rcu *se_lun_acl; 641 spinlock_t ua_lock; 642 struct se_lun __rcu *se_lun; 643 #define DEF_PR_REG_ACTIVE 1 644 unsigned long deve_flags; 645 struct list_head alua_port_list; 646 struct list_head lun_link; 647 struct list_head ua_list; 648 struct hlist_node link; 649 struct rcu_head rcu_head; 650 }; 651 652 struct se_dev_attrib { 653 int emulate_model_alias; 654 int emulate_dpo; 655 int emulate_fua_write; 656 int emulate_fua_read; 657 int emulate_write_cache; 658 int emulate_ua_intlck_ctrl; 659 int emulate_tas; 660 int emulate_tpu; 661 int emulate_tpws; 662 int emulate_caw; 663 int emulate_3pc; 664 int pi_prot_format; 665 enum target_prot_type pi_prot_type; 666 enum target_prot_type hw_pi_prot_type; 667 int pi_prot_verify; 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 bool lun_shutdown; 705 bool lun_access_ro; 706 u32 lun_index; 707 708 /* RELATIVE TARGET PORT IDENTIFER */ 709 u16 lun_rtpi; 710 atomic_t lun_acl_count; 711 struct se_device __rcu *lun_se_dev; 712 713 struct list_head lun_deve_list; 714 spinlock_t lun_deve_lock; 715 716 /* ALUA state */ 717 int lun_tg_pt_secondary_stat; 718 int lun_tg_pt_secondary_write_md; 719 atomic_t lun_tg_pt_secondary_offline; 720 struct mutex lun_tg_pt_md_mutex; 721 722 /* ALUA target port group linkage */ 723 struct list_head lun_tg_pt_gp_link; 724 struct t10_alua_tg_pt_gp *lun_tg_pt_gp; 725 spinlock_t lun_tg_pt_gp_lock; 726 727 struct se_portal_group *lun_tpg; 728 struct scsi_port_stats lun_stats; 729 struct config_group lun_group; 730 struct se_port_stat_grps port_stat_grps; 731 struct completion lun_ref_comp; 732 struct completion lun_shutdown_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 /* 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 #define DF_CONFIGURED 0x00000001 753 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 754 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 755 #define DF_USING_UDEV_PATH 0x00000008 756 #define DF_USING_ALIAS 0x00000010 757 #define DF_READ_ONLY 0x00000020 758 /* Physical device queue depth */ 759 u32 queue_depth; 760 /* Used for SPC-2 reservations enforce of ISIDs */ 761 u64 dev_res_bin_isid; 762 /* Pointer to transport specific device structure */ 763 u32 dev_index; 764 u64 creation_time; 765 atomic_long_t num_resets; 766 atomic_long_t aborts_complete; 767 atomic_long_t aborts_no_task; 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 /* Pointer to associated SE HBA */ 800 struct se_hba *se_hba; 801 /* T10 Inquiry and VPD WWN Information */ 802 struct t10_wwn t10_wwn; 803 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 804 struct t10_alua t10_alua; 805 /* T10 SPC-2 + SPC-3 Reservations */ 806 struct t10_reservation t10_pr; 807 struct se_dev_attrib dev_attrib; 808 struct config_group dev_group; 809 struct config_group dev_pr_group; 810 struct se_dev_stat_grps dev_stat_grps; 811 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 812 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 813 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 814 unsigned char udev_path[SE_UDEV_PATH_LEN]; 815 /* Pointer to template of function pointers for transport */ 816 const struct target_backend_ops *transport; 817 struct se_lun xcopy_lun; 818 /* Protection Information */ 819 int prot_length; 820 /* For se_lun->lun_se_dev RCU read-side critical access */ 821 u32 hba_index; 822 struct rcu_head rcu_head; 823 }; 824 825 struct se_hba { 826 u16 hba_tpgt; 827 u32 hba_id; 828 /* See hba_flags_table */ 829 u32 hba_flags; 830 /* Virtual iSCSI devices attached. */ 831 u32 dev_count; 832 u32 hba_index; 833 /* Pointer to transport specific host structure. */ 834 void *hba_ptr; 835 struct list_head hba_node; 836 spinlock_t device_lock; 837 struct config_group hba_group; 838 struct mutex hba_access_mutex; 839 struct target_backend *backend; 840 }; 841 842 struct se_tpg_np { 843 struct se_portal_group *tpg_np_parent; 844 struct config_group tpg_np_group; 845 }; 846 847 static inline struct se_tpg_np *to_tpg_np(struct config_item *item) 848 { 849 return container_of(to_config_group(item), struct se_tpg_np, 850 tpg_np_group); 851 } 852 853 struct se_portal_group { 854 /* 855 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1. 856 * 857 * Negative values can be used by fabric drivers for internal use TPGs. 858 */ 859 int proto_id; 860 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 861 atomic_t tpg_pr_ref_count; 862 /* Spinlock for adding/removing ACLed Nodes */ 863 struct mutex acl_node_mutex; 864 /* Spinlock for adding/removing sessions */ 865 spinlock_t session_lock; 866 struct mutex tpg_lun_mutex; 867 struct list_head se_tpg_node; 868 /* linked list for initiator ACL list */ 869 struct list_head acl_node_list; 870 struct hlist_head tpg_lun_hlist; 871 struct se_lun *tpg_virt_lun0; 872 /* List of TCM sessions associated wth this TPG */ 873 struct list_head tpg_sess_list; 874 /* Pointer to $FABRIC_MOD dependent code */ 875 const struct target_core_fabric_ops *se_tpg_tfo; 876 struct se_wwn *se_tpg_wwn; 877 struct config_group tpg_group; 878 struct config_group tpg_lun_group; 879 struct config_group tpg_np_group; 880 struct config_group tpg_acl_group; 881 struct config_group tpg_attrib_group; 882 struct config_group tpg_auth_group; 883 struct config_group tpg_param_group; 884 }; 885 886 static inline struct se_portal_group *to_tpg(struct config_item *item) 887 { 888 return container_of(to_config_group(item), struct se_portal_group, 889 tpg_group); 890 } 891 892 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item) 893 { 894 return container_of(to_config_group(item), struct se_portal_group, 895 tpg_attrib_group); 896 } 897 898 static inline struct se_portal_group *auth_to_tpg(struct config_item *item) 899 { 900 return container_of(to_config_group(item), struct se_portal_group, 901 tpg_auth_group); 902 } 903 904 static inline struct se_portal_group *param_to_tpg(struct config_item *item) 905 { 906 return container_of(to_config_group(item), struct se_portal_group, 907 tpg_param_group); 908 } 909 910 struct se_wwn { 911 struct target_fabric_configfs *wwn_tf; 912 void *priv; 913 struct config_group wwn_group; 914 struct config_group fabric_stat_group; 915 }; 916 917 static inline void atomic_inc_mb(atomic_t *v) 918 { 919 smp_mb__before_atomic(); 920 atomic_inc(v); 921 smp_mb__after_atomic(); 922 } 923 924 static inline void atomic_dec_mb(atomic_t *v) 925 { 926 smp_mb__before_atomic(); 927 atomic_dec(v); 928 smp_mb__after_atomic(); 929 } 930 931 #endif /* TARGET_CORE_BASE_H */ 932