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 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 }; 121 122 /* Used for struct se_cmd->se_cmd_flags */ 123 enum se_cmd_flags_table { 124 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 125 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 126 SCF_EMULATED_TASK_SENSE = 0x00000004, 127 SCF_SCSI_DATA_CDB = 0x00000008, 128 SCF_SCSI_TMR_CDB = 0x00000010, 129 SCF_FUA = 0x00000080, 130 SCF_SE_LUN_CMD = 0x00000100, 131 SCF_BIDI = 0x00000400, 132 SCF_SENT_CHECK_CONDITION = 0x00000800, 133 SCF_OVERFLOW_BIT = 0x00001000, 134 SCF_UNDERFLOW_BIT = 0x00002000, 135 SCF_SEND_DELAYED_TAS = 0x00004000, 136 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 137 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 138 SCF_COMPARE_AND_WRITE = 0x00080000, 139 SCF_COMPARE_AND_WRITE_POST = 0x00100000, 140 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000, 141 }; 142 143 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */ 144 enum transport_lunflags_table { 145 TRANSPORT_LUNFLAGS_READ_ONLY = 0x01, 146 TRANSPORT_LUNFLAGS_READ_WRITE = 0x02, 147 }; 148 149 /* 150 * Used by transport_send_check_condition_and_sense() 151 * to signal which ASC/ASCQ sense payload should be built. 152 */ 153 typedef unsigned __bitwise__ sense_reason_t; 154 155 enum tcm_sense_reason_table { 156 #define R(x) (__force sense_reason_t )(x) 157 TCM_NO_SENSE = R(0x00), 158 TCM_NON_EXISTENT_LUN = R(0x01), 159 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 160 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 161 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 162 TCM_SERVICE_CRC_ERROR = R(0x05), 163 TCM_SNACK_REJECTED = R(0x06), 164 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 165 TCM_INVALID_CDB_FIELD = R(0x08), 166 TCM_INVALID_PARAMETER_LIST = R(0x09), 167 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 168 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 169 TCM_WRITE_PROTECTED = R(0x0c), 170 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 171 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 172 TCM_CHECK_CONDITION_NOT_READY = R(0x0f), 173 TCM_RESERVATION_CONFLICT = R(0x10), 174 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 175 TCM_OUT_OF_RESOURCES = R(0x12), 176 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 177 TCM_MISCOMPARE_VERIFY = R(0x14), 178 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 179 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 180 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 181 #undef R 182 }; 183 184 enum target_sc_flags_table { 185 TARGET_SCF_BIDI_OP = 0x01, 186 TARGET_SCF_ACK_KREF = 0x02, 187 TARGET_SCF_UNKNOWN_SIZE = 0x04, 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); 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_REQUEST_STOP (1 << 8) 492 #define CMD_T_BUSY (1 << 9) 493 spinlock_t t_state_lock; 494 struct kref cmd_kref; 495 struct completion t_transport_stop_comp; 496 497 struct work_struct work; 498 499 struct scatterlist *t_data_sg; 500 struct scatterlist *t_data_sg_orig; 501 unsigned int t_data_nents; 502 unsigned int t_data_nents_orig; 503 void *t_data_vmap; 504 struct scatterlist *t_bidi_data_sg; 505 unsigned int t_bidi_data_nents; 506 507 /* Used for lun->lun_ref counting */ 508 int lun_ref_active; 509 510 struct list_head state_list; 511 512 /* old task stop completion, consider merging with some of the above */ 513 struct completion task_stop_comp; 514 515 /* backend private data */ 516 void *priv; 517 518 /* DIF related members */ 519 enum target_prot_op prot_op; 520 enum target_prot_type prot_type; 521 u8 prot_checks; 522 bool prot_pto; 523 u32 prot_length; 524 u32 reftag_seed; 525 struct scatterlist *t_prot_sg; 526 unsigned int t_prot_nents; 527 sense_reason_t pi_err; 528 sector_t bad_sector; 529 }; 530 531 struct se_ua { 532 u8 ua_asc; 533 u8 ua_ascq; 534 struct list_head ua_nacl_list; 535 }; 536 537 struct se_node_acl { 538 char initiatorname[TRANSPORT_IQN_LEN]; 539 /* Used to signal demo mode created ACL, disabled by default */ 540 bool dynamic_node_acl; 541 bool acl_stop:1; 542 u32 queue_depth; 543 u32 acl_index; 544 enum target_prot_type saved_prot_type; 545 #define MAX_ACL_TAG_SIZE 64 546 char acl_tag[MAX_ACL_TAG_SIZE]; 547 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 548 atomic_t acl_pr_ref_count; 549 struct hlist_head lun_entry_hlist; 550 struct se_session *nacl_sess; 551 struct se_portal_group *se_tpg; 552 struct mutex lun_entry_mutex; 553 spinlock_t nacl_sess_lock; 554 struct config_group acl_group; 555 struct config_group acl_attrib_group; 556 struct config_group acl_auth_group; 557 struct config_group acl_param_group; 558 struct config_group acl_fabric_stat_group; 559 struct config_group *acl_default_groups[5]; 560 struct list_head acl_list; 561 struct list_head acl_sess_list; 562 struct completion acl_free_comp; 563 struct kref acl_kref; 564 }; 565 566 struct se_session { 567 unsigned sess_tearing_down:1; 568 u64 sess_bin_isid; 569 enum target_prot_op sup_prot_ops; 570 enum target_prot_type sess_prot_type; 571 struct se_node_acl *se_node_acl; 572 struct se_portal_group *se_tpg; 573 void *fabric_sess_ptr; 574 struct list_head sess_list; 575 struct list_head sess_acl_list; 576 struct list_head sess_cmd_list; 577 struct list_head sess_wait_list; 578 spinlock_t sess_cmd_lock; 579 struct kref sess_kref; 580 void *sess_cmd_map; 581 struct percpu_ida sess_tag_pool; 582 }; 583 584 struct se_device; 585 struct se_transform_info; 586 struct scatterlist; 587 588 struct se_ml_stat_grps { 589 struct config_group stat_group; 590 struct config_group scsi_auth_intr_group; 591 struct config_group scsi_att_intr_port_group; 592 }; 593 594 struct se_lun_acl { 595 u64 mapped_lun; 596 struct se_node_acl *se_lun_nacl; 597 struct se_lun *se_lun; 598 struct config_group se_lun_group; 599 struct se_ml_stat_grps ml_stat_grps; 600 }; 601 602 struct se_dev_entry { 603 /* See transport_lunflags_table */ 604 u64 mapped_lun; 605 u64 pr_res_key; 606 u64 creation_time; 607 u32 lun_flags; 608 u32 attach_count; 609 atomic_long_t total_cmds; 610 atomic_long_t read_bytes; 611 atomic_long_t write_bytes; 612 atomic_t ua_count; 613 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 614 struct kref pr_kref; 615 struct completion pr_comp; 616 struct se_lun_acl __rcu *se_lun_acl; 617 spinlock_t ua_lock; 618 struct se_lun __rcu *se_lun; 619 #define DEF_PR_REG_ACTIVE 1 620 unsigned long deve_flags; 621 struct list_head alua_port_list; 622 struct list_head lun_link; 623 struct list_head ua_list; 624 struct hlist_node link; 625 struct rcu_head rcu_head; 626 }; 627 628 struct se_dev_attrib { 629 int emulate_model_alias; 630 int emulate_dpo; 631 int emulate_fua_write; 632 int emulate_fua_read; 633 int emulate_write_cache; 634 int emulate_ua_intlck_ctrl; 635 int emulate_tas; 636 int emulate_tpu; 637 int emulate_tpws; 638 int emulate_caw; 639 int emulate_3pc; 640 int pi_prot_format; 641 enum target_prot_type pi_prot_type; 642 enum target_prot_type hw_pi_prot_type; 643 int enforce_pr_isids; 644 int force_pr_aptpl; 645 int is_nonrot; 646 int emulate_rest_reord; 647 u32 hw_block_size; 648 u32 block_size; 649 u32 hw_max_sectors; 650 u32 optimal_sectors; 651 u32 hw_queue_depth; 652 u32 queue_depth; 653 u32 max_unmap_lba_count; 654 u32 max_unmap_block_desc_count; 655 u32 unmap_granularity; 656 u32 unmap_granularity_alignment; 657 u32 max_write_same_len; 658 u32 max_bytes_per_io; 659 struct se_device *da_dev; 660 struct config_group da_group; 661 }; 662 663 struct se_port_stat_grps { 664 struct config_group stat_group; 665 struct config_group scsi_port_group; 666 struct config_group scsi_tgt_port_group; 667 struct config_group scsi_transport_group; 668 }; 669 670 struct scsi_port_stats { 671 atomic_long_t cmd_pdus; 672 atomic_long_t tx_data_octets; 673 atomic_long_t rx_data_octets; 674 }; 675 676 struct se_lun { 677 u64 unpacked_lun; 678 #define SE_LUN_LINK_MAGIC 0xffff7771 679 u32 lun_link_magic; 680 u32 lun_access; 681 u32 lun_index; 682 683 /* RELATIVE TARGET PORT IDENTIFER */ 684 u16 lun_rtpi; 685 atomic_t lun_acl_count; 686 struct se_device __rcu *lun_se_dev; 687 688 struct list_head lun_deve_list; 689 spinlock_t lun_deve_lock; 690 691 /* ALUA state */ 692 int lun_tg_pt_secondary_stat; 693 int lun_tg_pt_secondary_write_md; 694 atomic_t lun_tg_pt_secondary_offline; 695 struct mutex lun_tg_pt_md_mutex; 696 697 /* ALUA target port group linkage */ 698 struct list_head lun_tg_pt_gp_link; 699 struct t10_alua_tg_pt_gp *lun_tg_pt_gp; 700 spinlock_t lun_tg_pt_gp_lock; 701 702 struct se_portal_group *lun_tpg; 703 struct scsi_port_stats lun_stats; 704 struct config_group lun_group; 705 struct se_port_stat_grps port_stat_grps; 706 struct completion lun_ref_comp; 707 struct percpu_ref lun_ref; 708 struct list_head lun_dev_link; 709 struct hlist_node link; 710 struct rcu_head rcu_head; 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_device { 721 #define SE_DEV_LINK_MAGIC 0xfeeddeef 722 u32 dev_link_magic; 723 /* RELATIVE TARGET PORT IDENTIFER Counter */ 724 u16 dev_rpti_counter; 725 /* Used for SAM Task Attribute ordering */ 726 u32 dev_cur_ordered_id; 727 u32 dev_flags; 728 #define DF_CONFIGURED 0x00000001 729 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 730 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 731 #define DF_USING_UDEV_PATH 0x00000008 732 #define DF_USING_ALIAS 0x00000010 733 #define DF_READ_ONLY 0x00000020 734 /* Physical device queue depth */ 735 u32 queue_depth; 736 /* Used for SPC-2 reservations enforce of ISIDs */ 737 u64 dev_res_bin_isid; 738 /* Pointer to transport specific device structure */ 739 u32 dev_index; 740 u64 creation_time; 741 atomic_long_t num_resets; 742 atomic_long_t num_cmds; 743 atomic_long_t read_bytes; 744 atomic_long_t write_bytes; 745 /* Active commands on this virtual SE device */ 746 atomic_t simple_cmds; 747 atomic_t dev_ordered_sync; 748 atomic_t dev_qf_count; 749 u32 export_count; 750 spinlock_t delayed_cmd_lock; 751 spinlock_t execute_task_lock; 752 spinlock_t dev_reservation_lock; 753 unsigned int dev_reservation_flags; 754 #define DRF_SPC2_RESERVATIONS 0x00000001 755 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 756 spinlock_t se_port_lock; 757 spinlock_t se_tmr_lock; 758 spinlock_t qf_cmd_lock; 759 struct semaphore caw_sem; 760 /* Used for legacy SPC-2 reservationsa */ 761 struct se_node_acl *dev_reserved_node_acl; 762 /* Used for ALUA Logical Unit Group membership */ 763 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 764 /* Used for SPC-3 Persistent Reservations */ 765 struct t10_pr_registration *dev_pr_res_holder; 766 struct list_head dev_sep_list; 767 struct list_head dev_tmr_list; 768 struct workqueue_struct *tmr_wq; 769 struct work_struct qf_work_queue; 770 struct list_head delayed_cmd_list; 771 struct list_head state_list; 772 struct list_head qf_cmd_list; 773 struct list_head g_dev_node; 774 /* Pointer to associated SE HBA */ 775 struct se_hba *se_hba; 776 /* T10 Inquiry and VPD WWN Information */ 777 struct t10_wwn t10_wwn; 778 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 779 struct t10_alua t10_alua; 780 /* T10 SPC-2 + SPC-3 Reservations */ 781 struct t10_reservation t10_pr; 782 struct se_dev_attrib dev_attrib; 783 struct config_group dev_group; 784 struct config_group dev_pr_group; 785 struct se_dev_stat_grps dev_stat_grps; 786 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 787 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 788 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 789 unsigned char udev_path[SE_UDEV_PATH_LEN]; 790 /* Pointer to template of function pointers for transport */ 791 const struct target_backend_ops *transport; 792 /* Linked list for struct se_hba struct se_device list */ 793 struct list_head dev_list; 794 struct se_lun xcopy_lun; 795 /* Protection Information */ 796 int prot_length; 797 /* For se_lun->lun_se_dev RCU read-side critical access */ 798 u32 hba_index; 799 struct rcu_head rcu_head; 800 }; 801 802 struct se_hba { 803 u16 hba_tpgt; 804 u32 hba_id; 805 /* See hba_flags_table */ 806 u32 hba_flags; 807 /* Virtual iSCSI devices attached. */ 808 u32 dev_count; 809 u32 hba_index; 810 /* Pointer to transport specific host structure. */ 811 void *hba_ptr; 812 struct list_head hba_node; 813 spinlock_t device_lock; 814 struct config_group hba_group; 815 struct mutex hba_access_mutex; 816 struct target_backend *backend; 817 }; 818 819 struct se_tpg_np { 820 struct se_portal_group *tpg_np_parent; 821 struct config_group tpg_np_group; 822 }; 823 824 struct se_portal_group { 825 /* 826 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1. 827 * 828 * Negative values can be used by fabric drivers for internal use TPGs. 829 */ 830 int proto_id; 831 /* Number of ACLed Initiator Nodes for this TPG */ 832 u32 num_node_acls; 833 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 834 atomic_t tpg_pr_ref_count; 835 /* Spinlock for adding/removing ACLed Nodes */ 836 struct mutex acl_node_mutex; 837 /* Spinlock for adding/removing sessions */ 838 spinlock_t session_lock; 839 struct mutex tpg_lun_mutex; 840 struct list_head se_tpg_node; 841 /* linked list for initiator ACL list */ 842 struct list_head acl_node_list; 843 struct hlist_head tpg_lun_hlist; 844 struct se_lun *tpg_virt_lun0; 845 /* List of TCM sessions associated wth this TPG */ 846 struct list_head tpg_sess_list; 847 /* Pointer to $FABRIC_MOD dependent code */ 848 const struct target_core_fabric_ops *se_tpg_tfo; 849 struct se_wwn *se_tpg_wwn; 850 struct config_group tpg_group; 851 struct config_group *tpg_default_groups[7]; 852 struct config_group tpg_lun_group; 853 struct config_group tpg_np_group; 854 struct config_group tpg_acl_group; 855 struct config_group tpg_attrib_group; 856 struct config_group tpg_auth_group; 857 struct config_group tpg_param_group; 858 }; 859 860 struct se_wwn { 861 struct target_fabric_configfs *wwn_tf; 862 struct config_group wwn_group; 863 struct config_group *wwn_default_groups[2]; 864 struct config_group fabric_stat_group; 865 }; 866 867 static inline void atomic_inc_mb(atomic_t *v) 868 { 869 smp_mb__before_atomic(); 870 atomic_inc(v); 871 smp_mb__after_atomic(); 872 } 873 874 static inline void atomic_dec_mb(atomic_t *v) 875 { 876 smp_mb__before_atomic(); 877 atomic_dec(v); 878 smp_mb__after_atomic(); 879 } 880 881 #endif /* TARGET_CORE_BASE_H */ 882