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 <scsi/scsi_cmnd.h> 10 #include <net/sock.h> 11 #include <net/tcp.h> 12 13 #define TARGET_CORE_MOD_VERSION "v4.1.0" 14 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION 15 16 /* Maximum Number of LUNs per Target Portal Group */ 17 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */ 18 #define TRANSPORT_MAX_LUNS_PER_TPG 256 19 /* 20 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code. 21 * 22 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and 23 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use 24 * 16-byte CDBs by default and require an extra allocation for 25 * 32-byte CDBs to because of legacy issues. 26 * 27 * Within TCM Core there are no such legacy limitiations, so we go ahead 28 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size() 29 * within all TCM Core and subsystem plugin code. 30 */ 31 #define TCM_MAX_COMMAND_SIZE 32 32 /* 33 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently 34 * defined 96, but the real limit is 252 (or 260 including the header) 35 */ 36 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE 37 /* Used by transport_send_check_condition_and_sense() */ 38 #define SPC_SENSE_KEY_OFFSET 2 39 #define SPC_ADD_SENSE_LEN_OFFSET 7 40 #define SPC_DESC_TYPE_OFFSET 8 41 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9 42 #define SPC_VALIDITY_OFFSET 10 43 #define SPC_ASC_KEY_OFFSET 12 44 #define SPC_ASCQ_KEY_OFFSET 13 45 #define TRANSPORT_IQN_LEN 224 46 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ 47 #define LU_GROUP_NAME_BUF 256 48 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ 49 #define TG_PT_GROUP_NAME_BUF 256 50 /* Used to parse VPD into struct t10_vpd */ 51 #define VPD_TMP_BUF_SIZE 254 52 /* Used by transport_generic_cmd_sequencer() */ 53 #define READ_BLOCK_LEN 6 54 #define READ_CAP_LEN 8 55 #define READ_POSITION_LEN 20 56 #define INQUIRY_LEN 36 57 /* Used by transport_get_inquiry_vpd_serial() */ 58 #define INQUIRY_VPD_SERIAL_LEN 254 59 /* Used by transport_get_inquiry_vpd_device_ident() */ 60 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 61 62 /* Attempts before moving from SHORT to LONG */ 63 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 64 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ 65 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ 66 67 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ 68 69 /* struct se_dev_attrib sanity values */ 70 /* Default max_unmap_lba_count */ 71 #define DA_MAX_UNMAP_LBA_COUNT 0 72 /* Default max_unmap_block_desc_count */ 73 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 74 /* Default unmap_granularity */ 75 #define DA_UNMAP_GRANULARITY_DEFAULT 0 76 /* Default unmap_granularity_alignment */ 77 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 78 /* Default max_write_same_len, disabled by default */ 79 #define DA_MAX_WRITE_SAME_LEN 0 80 /* Default max transfer length */ 81 #define DA_FABRIC_MAX_SECTORS 8192 82 /* Use a model alias based on the configfs backend device name */ 83 #define DA_EMULATE_MODEL_ALIAS 0 84 /* Emulation for Direct Page Out */ 85 #define DA_EMULATE_DPO 0 86 /* Emulation for Forced Unit Access WRITEs */ 87 #define DA_EMULATE_FUA_WRITE 1 88 /* Emulation for Forced Unit Access READs */ 89 #define DA_EMULATE_FUA_READ 0 90 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 91 #define DA_EMULATE_WRITE_CACHE 0 92 /* Emulation for UNIT ATTENTION Interlock Control */ 93 #define DA_EMULATE_UA_INTLLCK_CTRL 0 94 /* Emulation for TASK_ABORTED status (TAS) by default */ 95 #define DA_EMULATE_TAS 1 96 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 97 #define DA_EMULATE_TPU 0 98 /* 99 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 100 * block/blk-lib.c:blkdev_issue_discard() 101 */ 102 #define DA_EMULATE_TPWS 0 103 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */ 104 #define DA_EMULATE_CAW 1 105 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */ 106 #define DA_EMULATE_3PC 1 107 /* No Emulation for PSCSI by default */ 108 #define DA_EMULATE_ALUA 0 109 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 110 #define DA_ENFORCE_PR_ISIDS 1 111 /* Force SPC-3 PR Activate Persistence across Target Power Loss */ 112 #define DA_FORCE_PR_APTPL 0 113 #define DA_STATUS_MAX_SECTORS_MIN 16 114 #define DA_STATUS_MAX_SECTORS_MAX 8192 115 /* By default don't report non-rotating (solid state) medium */ 116 #define DA_IS_NONROT 0 117 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 118 #define DA_EMULATE_REST_REORD 0 119 120 #define SE_INQUIRY_BUF 1024 121 #define SE_MODE_PAGE_BUF 512 122 #define SE_SENSE_BUF 96 123 124 /* struct se_hba->hba_flags */ 125 enum hba_flags_table { 126 HBA_FLAGS_INTERNAL_USE = 0x01, 127 HBA_FLAGS_PSCSI_MODE = 0x02, 128 }; 129 130 /* struct se_lun->lun_status */ 131 enum transport_lun_status_table { 132 TRANSPORT_LUN_STATUS_FREE = 0, 133 TRANSPORT_LUN_STATUS_ACTIVE = 1, 134 }; 135 136 /* struct se_portal_group->se_tpg_type */ 137 enum transport_tpg_type_table { 138 TRANSPORT_TPG_TYPE_NORMAL = 0, 139 TRANSPORT_TPG_TYPE_DISCOVERY = 1, 140 }; 141 142 /* Special transport agnostic struct se_cmd->t_states */ 143 enum transport_state_table { 144 TRANSPORT_NO_STATE = 0, 145 TRANSPORT_NEW_CMD = 1, 146 TRANSPORT_WRITE_PENDING = 3, 147 TRANSPORT_PROCESSING = 5, 148 TRANSPORT_COMPLETE = 6, 149 TRANSPORT_ISTATE_PROCESSING = 11, 150 TRANSPORT_COMPLETE_QF_WP = 18, 151 TRANSPORT_COMPLETE_QF_OK = 19, 152 }; 153 154 /* Used for struct se_cmd->se_cmd_flags */ 155 enum se_cmd_flags_table { 156 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 157 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 158 SCF_EMULATED_TASK_SENSE = 0x00000004, 159 SCF_SCSI_DATA_CDB = 0x00000008, 160 SCF_SCSI_TMR_CDB = 0x00000010, 161 SCF_FUA = 0x00000080, 162 SCF_SE_LUN_CMD = 0x00000100, 163 SCF_BIDI = 0x00000400, 164 SCF_SENT_CHECK_CONDITION = 0x00000800, 165 SCF_OVERFLOW_BIT = 0x00001000, 166 SCF_UNDERFLOW_BIT = 0x00002000, 167 SCF_SEND_DELAYED_TAS = 0x00004000, 168 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 169 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 170 SCF_ACK_KREF = 0x00040000, 171 SCF_COMPARE_AND_WRITE = 0x00080000, 172 SCF_COMPARE_AND_WRITE_POST = 0x00100000, 173 SCF_CMD_XCOPY_PASSTHROUGH = 0x00200000, 174 }; 175 176 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */ 177 enum transport_lunflags_table { 178 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00, 179 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01, 180 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02, 181 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04, 182 }; 183 184 /* 185 * Used by transport_send_check_condition_and_sense() 186 * to signal which ASC/ASCQ sense payload should be built. 187 */ 188 typedef unsigned __bitwise__ sense_reason_t; 189 190 enum tcm_sense_reason_table { 191 #define R(x) (__force sense_reason_t )(x) 192 TCM_NO_SENSE = R(0x00), 193 TCM_NON_EXISTENT_LUN = R(0x01), 194 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 195 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 196 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 197 TCM_SERVICE_CRC_ERROR = R(0x05), 198 TCM_SNACK_REJECTED = R(0x06), 199 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 200 TCM_INVALID_CDB_FIELD = R(0x08), 201 TCM_INVALID_PARAMETER_LIST = R(0x09), 202 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 203 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 204 TCM_WRITE_PROTECTED = R(0x0c), 205 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 206 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 207 TCM_CHECK_CONDITION_NOT_READY = R(0x0f), 208 TCM_RESERVATION_CONFLICT = R(0x10), 209 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 210 TCM_OUT_OF_RESOURCES = R(0x12), 211 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 212 TCM_MISCOMPARE_VERIFY = R(0x14), 213 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 214 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 215 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 216 #undef R 217 }; 218 219 enum target_sc_flags_table { 220 TARGET_SCF_BIDI_OP = 0x01, 221 TARGET_SCF_ACK_KREF = 0x02, 222 TARGET_SCF_UNKNOWN_SIZE = 0x04, 223 }; 224 225 /* fabric independent task management function values */ 226 enum tcm_tmreq_table { 227 TMR_ABORT_TASK = 1, 228 TMR_ABORT_TASK_SET = 2, 229 TMR_CLEAR_ACA = 3, 230 TMR_CLEAR_TASK_SET = 4, 231 TMR_LUN_RESET = 5, 232 TMR_TARGET_WARM_RESET = 6, 233 TMR_TARGET_COLD_RESET = 7, 234 }; 235 236 /* fabric independent task management response values */ 237 enum tcm_tmrsp_table { 238 TMR_FUNCTION_FAILED = 0, 239 TMR_FUNCTION_COMPLETE = 1, 240 TMR_TASK_DOES_NOT_EXIST = 2, 241 TMR_LUN_DOES_NOT_EXIST = 3, 242 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, 243 TMR_FUNCTION_REJECTED = 5, 244 }; 245 246 /* 247 * Used for target SCSI statistics 248 */ 249 typedef enum { 250 SCSI_INST_INDEX, 251 SCSI_DEVICE_INDEX, 252 SCSI_AUTH_INTR_INDEX, 253 SCSI_INDEX_TYPE_MAX 254 } scsi_index_t; 255 256 struct se_cmd; 257 258 struct t10_alua_lba_map_member { 259 struct list_head lba_map_mem_list; 260 int lba_map_mem_alua_state; 261 int lba_map_mem_alua_pg_id; 262 }; 263 264 struct t10_alua_lba_map { 265 u64 lba_map_first_lba; 266 u64 lba_map_last_lba; 267 struct list_head lba_map_list; 268 struct list_head lba_map_mem_list; 269 }; 270 271 struct t10_alua { 272 /* ALUA Target Port Group ID */ 273 u16 alua_tg_pt_gps_counter; 274 u32 alua_tg_pt_gps_count; 275 /* Referrals support */ 276 spinlock_t lba_map_lock; 277 u32 lba_map_segment_size; 278 u32 lba_map_segment_multiplier; 279 struct list_head lba_map_list; 280 spinlock_t tg_pt_gps_lock; 281 struct se_device *t10_dev; 282 /* Used for default ALUA Target Port Group */ 283 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 284 /* Used for default ALUA Target Port Group ConfigFS group */ 285 struct config_group alua_tg_pt_gps_group; 286 struct list_head tg_pt_gps_list; 287 }; 288 289 struct t10_alua_lu_gp { 290 u16 lu_gp_id; 291 int lu_gp_valid_id; 292 u32 lu_gp_members; 293 atomic_t lu_gp_ref_cnt; 294 spinlock_t lu_gp_lock; 295 struct config_group lu_gp_group; 296 struct list_head lu_gp_node; 297 struct list_head lu_gp_mem_list; 298 }; 299 300 struct t10_alua_lu_gp_member { 301 bool lu_gp_assoc; 302 atomic_t lu_gp_mem_ref_cnt; 303 spinlock_t lu_gp_mem_lock; 304 struct t10_alua_lu_gp *lu_gp; 305 struct se_device *lu_gp_mem_dev; 306 struct list_head lu_gp_mem_list; 307 }; 308 309 struct t10_alua_tg_pt_gp { 310 u16 tg_pt_gp_id; 311 int tg_pt_gp_valid_id; 312 int tg_pt_gp_alua_supported_states; 313 int tg_pt_gp_alua_pending_state; 314 int tg_pt_gp_alua_previous_state; 315 int tg_pt_gp_alua_access_status; 316 int tg_pt_gp_alua_access_type; 317 int tg_pt_gp_nonop_delay_msecs; 318 int tg_pt_gp_trans_delay_msecs; 319 int tg_pt_gp_implicit_trans_secs; 320 int tg_pt_gp_pref; 321 int tg_pt_gp_write_metadata; 322 u32 tg_pt_gp_members; 323 atomic_t tg_pt_gp_alua_access_state; 324 atomic_t tg_pt_gp_ref_cnt; 325 spinlock_t tg_pt_gp_lock; 326 struct mutex tg_pt_gp_md_mutex; 327 struct se_device *tg_pt_gp_dev; 328 struct config_group tg_pt_gp_group; 329 struct list_head tg_pt_gp_list; 330 struct list_head tg_pt_gp_mem_list; 331 struct se_port *tg_pt_gp_alua_port; 332 struct se_node_acl *tg_pt_gp_alua_nacl; 333 struct delayed_work tg_pt_gp_transition_work; 334 struct completion *tg_pt_gp_transition_complete; 335 }; 336 337 struct t10_alua_tg_pt_gp_member { 338 bool tg_pt_gp_assoc; 339 atomic_t tg_pt_gp_mem_ref_cnt; 340 spinlock_t tg_pt_gp_mem_lock; 341 struct t10_alua_tg_pt_gp *tg_pt_gp; 342 struct se_port *tg_pt; 343 struct list_head tg_pt_gp_mem_list; 344 }; 345 346 struct t10_vpd { 347 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 348 int protocol_identifier_set; 349 u32 protocol_identifier; 350 u32 device_identifier_code_set; 351 u32 association; 352 u32 device_identifier_type; 353 struct list_head vpd_list; 354 }; 355 356 struct t10_wwn { 357 char vendor[8]; 358 char model[16]; 359 char revision[4]; 360 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 361 spinlock_t t10_vpd_lock; 362 struct se_device *t10_dev; 363 struct config_group t10_wwn_group; 364 struct list_head t10_vpd_list; 365 }; 366 367 struct t10_pr_registration { 368 /* Used for fabrics that contain WWN+ISID */ 369 #define PR_REG_ISID_LEN 16 370 /* PR_REG_ISID_LEN + ',i,0x' */ 371 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 372 char pr_reg_isid[PR_REG_ISID_LEN]; 373 /* Used during APTPL metadata reading */ 374 #define PR_APTPL_MAX_IPORT_LEN 256 375 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 376 /* Used during APTPL metadata reading */ 377 #define PR_APTPL_MAX_TPORT_LEN 256 378 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 379 u16 pr_aptpl_rpti; 380 u16 pr_reg_tpgt; 381 /* Reservation effects all target ports */ 382 int pr_reg_all_tg_pt; 383 /* Activate Persistence across Target Power Loss */ 384 int pr_reg_aptpl; 385 int pr_res_holder; 386 int pr_res_type; 387 int pr_res_scope; 388 /* Used for fabric initiator WWPNs using a ISID */ 389 bool isid_present_at_reg; 390 u32 pr_res_mapped_lun; 391 u32 pr_aptpl_target_lun; 392 u32 pr_res_generation; 393 u64 pr_reg_bin_isid; 394 u64 pr_res_key; 395 atomic_t pr_res_holders; 396 struct se_node_acl *pr_reg_nacl; 397 struct se_dev_entry *pr_reg_deve; 398 struct se_lun *pr_reg_tg_pt_lun; 399 struct list_head pr_reg_list; 400 struct list_head pr_reg_abort_list; 401 struct list_head pr_reg_aptpl_list; 402 struct list_head pr_reg_atp_list; 403 struct list_head pr_reg_atp_mem_list; 404 }; 405 406 struct t10_reservation { 407 /* Reservation effects all target ports */ 408 int pr_all_tg_pt; 409 /* Activate Persistence across Target Power Loss enabled 410 * for SCSI device */ 411 int pr_aptpl_active; 412 #define PR_APTPL_BUF_LEN 8192 413 u32 pr_generation; 414 spinlock_t registration_lock; 415 spinlock_t aptpl_reg_lock; 416 /* 417 * This will always be set by one individual I_T Nexus. 418 * However with all_tg_pt=1, other I_T Nexus from the 419 * same initiator can access PR reg/res info on a different 420 * target port. 421 * 422 * There is also the 'All Registrants' case, where there is 423 * a single *pr_res_holder of the reservation, but all 424 * registrations are considered reservation holders. 425 */ 426 struct se_node_acl *pr_res_holder; 427 struct list_head registration_list; 428 struct list_head aptpl_reg_list; 429 }; 430 431 struct se_tmr_req { 432 /* Task Management function to be performed */ 433 u8 function; 434 /* Task Management response to send */ 435 u8 response; 436 int call_transport; 437 /* Reference to ITT that Task Mgmt should be performed */ 438 u32 ref_task_tag; 439 void *fabric_tmr_ptr; 440 struct se_cmd *task_cmd; 441 struct se_device *tmr_dev; 442 struct se_lun *tmr_lun; 443 struct list_head tmr_list; 444 }; 445 446 enum target_prot_op { 447 TARGET_PROT_NORMAL = 0, 448 TARGET_PROT_DIN_INSERT = (1 << 0), 449 TARGET_PROT_DOUT_INSERT = (1 << 1), 450 TARGET_PROT_DIN_STRIP = (1 << 2), 451 TARGET_PROT_DOUT_STRIP = (1 << 3), 452 TARGET_PROT_DIN_PASS = (1 << 4), 453 TARGET_PROT_DOUT_PASS = (1 << 5), 454 }; 455 456 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \ 457 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \ 458 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS 459 460 enum target_prot_type { 461 TARGET_DIF_TYPE0_PROT, 462 TARGET_DIF_TYPE1_PROT, 463 TARGET_DIF_TYPE2_PROT, 464 TARGET_DIF_TYPE3_PROT, 465 }; 466 467 enum target_core_dif_check { 468 TARGET_DIF_CHECK_GUARD = 0x1 << 0, 469 TARGET_DIF_CHECK_APPTAG = 0x1 << 1, 470 TARGET_DIF_CHECK_REFTAG = 0x1 << 2, 471 }; 472 473 struct se_dif_v1_tuple { 474 __be16 guard_tag; 475 __be16 app_tag; 476 __be32 ref_tag; 477 }; 478 479 /* for sam_task_attr */ 480 #define TCM_SIMPLE_TAG 0x20 481 #define TCM_HEAD_TAG 0x21 482 #define TCM_ORDERED_TAG 0x22 483 #define TCM_ACA_TAG 0x24 484 485 struct se_cmd { 486 /* SAM response code being sent to initiator */ 487 u8 scsi_status; 488 u8 scsi_asc; 489 u8 scsi_ascq; 490 u16 scsi_sense_length; 491 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 492 int alua_nonop_delay; 493 /* See include/linux/dma-mapping.h */ 494 enum dma_data_direction data_direction; 495 /* For SAM Task Attribute */ 496 int sam_task_attr; 497 /* Used for se_sess->sess_tag_pool */ 498 unsigned int map_tag; 499 /* Transport protocol dependent state, see transport_state_table */ 500 enum transport_state_table t_state; 501 unsigned cmd_wait_set:1; 502 unsigned unknown_data_length:1; 503 /* See se_cmd_flags_table */ 504 u32 se_cmd_flags; 505 u32 se_ordered_id; 506 /* Total size in bytes associated with command */ 507 u32 data_length; 508 u32 residual_count; 509 u32 orig_fe_lun; 510 /* Persistent Reservation key */ 511 u64 pr_res_key; 512 /* Used for sense data */ 513 void *sense_buffer; 514 struct list_head se_delayed_node; 515 struct list_head se_qf_node; 516 struct se_device *se_dev; 517 struct se_dev_entry *se_deve; 518 struct se_lun *se_lun; 519 /* Only used for internal passthrough and legacy TCM fabric modules */ 520 struct se_session *se_sess; 521 struct se_tmr_req *se_tmr_req; 522 struct list_head se_cmd_list; 523 struct completion cmd_wait_comp; 524 struct kref cmd_kref; 525 struct target_core_fabric_ops *se_tfo; 526 sense_reason_t (*execute_cmd)(struct se_cmd *); 527 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *, 528 u32, enum dma_data_direction); 529 sense_reason_t (*transport_complete_callback)(struct se_cmd *); 530 531 unsigned char *t_task_cdb; 532 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 533 unsigned long long t_task_lba; 534 unsigned int t_task_nolb; 535 unsigned int transport_state; 536 #define CMD_T_ABORTED (1 << 0) 537 #define CMD_T_ACTIVE (1 << 1) 538 #define CMD_T_COMPLETE (1 << 2) 539 #define CMD_T_SENT (1 << 4) 540 #define CMD_T_STOP (1 << 5) 541 #define CMD_T_DEV_ACTIVE (1 << 7) 542 #define CMD_T_REQUEST_STOP (1 << 8) 543 #define CMD_T_BUSY (1 << 9) 544 spinlock_t t_state_lock; 545 struct completion t_transport_stop_comp; 546 547 struct work_struct work; 548 549 struct scatterlist *t_data_sg; 550 struct scatterlist *t_data_sg_orig; 551 unsigned int t_data_nents; 552 unsigned int t_data_nents_orig; 553 void *t_data_vmap; 554 struct scatterlist *t_bidi_data_sg; 555 unsigned int t_bidi_data_nents; 556 557 struct list_head state_list; 558 bool state_active; 559 560 /* old task stop completion, consider merging with some of the above */ 561 struct completion task_stop_comp; 562 563 /* backend private data */ 564 void *priv; 565 566 /* Used for lun->lun_ref counting */ 567 int lun_ref_active; 568 569 /* DIF related members */ 570 enum target_prot_op prot_op; 571 enum target_prot_type prot_type; 572 u8 prot_checks; 573 u32 prot_length; 574 u32 reftag_seed; 575 struct scatterlist *t_prot_sg; 576 unsigned int t_prot_nents; 577 sense_reason_t pi_err; 578 sector_t bad_sector; 579 bool prot_pto; 580 }; 581 582 struct se_ua { 583 u8 ua_asc; 584 u8 ua_ascq; 585 struct se_node_acl *ua_nacl; 586 struct list_head ua_nacl_list; 587 }; 588 589 struct se_node_acl { 590 char initiatorname[TRANSPORT_IQN_LEN]; 591 /* Used to signal demo mode created ACL, disabled by default */ 592 bool dynamic_node_acl; 593 bool acl_stop:1; 594 u32 queue_depth; 595 u32 acl_index; 596 #define MAX_ACL_TAG_SIZE 64 597 char acl_tag[MAX_ACL_TAG_SIZE]; 598 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 599 atomic_t acl_pr_ref_count; 600 struct se_dev_entry **device_list; 601 struct se_session *nacl_sess; 602 struct se_portal_group *se_tpg; 603 spinlock_t device_list_lock; 604 spinlock_t nacl_sess_lock; 605 struct config_group acl_group; 606 struct config_group acl_attrib_group; 607 struct config_group acl_auth_group; 608 struct config_group acl_param_group; 609 struct config_group acl_fabric_stat_group; 610 struct config_group *acl_default_groups[5]; 611 struct list_head acl_list; 612 struct list_head acl_sess_list; 613 struct completion acl_free_comp; 614 struct kref acl_kref; 615 }; 616 617 struct se_session { 618 unsigned sess_tearing_down:1; 619 u64 sess_bin_isid; 620 enum target_prot_op sup_prot_ops; 621 struct se_node_acl *se_node_acl; 622 struct se_portal_group *se_tpg; 623 void *fabric_sess_ptr; 624 struct list_head sess_list; 625 struct list_head sess_acl_list; 626 struct list_head sess_cmd_list; 627 struct list_head sess_wait_list; 628 spinlock_t sess_cmd_lock; 629 struct kref sess_kref; 630 void *sess_cmd_map; 631 struct percpu_ida sess_tag_pool; 632 }; 633 634 struct se_device; 635 struct se_transform_info; 636 struct scatterlist; 637 638 struct se_ml_stat_grps { 639 struct config_group stat_group; 640 struct config_group scsi_auth_intr_group; 641 struct config_group scsi_att_intr_port_group; 642 }; 643 644 struct se_lun_acl { 645 char initiatorname[TRANSPORT_IQN_LEN]; 646 u32 mapped_lun; 647 struct se_node_acl *se_lun_nacl; 648 struct se_lun *se_lun; 649 struct list_head lacl_list; 650 struct config_group se_lun_group; 651 struct se_ml_stat_grps ml_stat_grps; 652 }; 653 654 struct se_dev_entry { 655 bool def_pr_registered; 656 /* See transport_lunflags_table */ 657 u32 lun_flags; 658 u32 mapped_lun; 659 u32 total_cmds; 660 u64 pr_res_key; 661 u64 creation_time; 662 u32 attach_count; 663 u64 read_bytes; 664 u64 write_bytes; 665 atomic_t ua_count; 666 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 667 atomic_t pr_ref_count; 668 struct se_lun_acl *se_lun_acl; 669 spinlock_t ua_lock; 670 struct se_lun *se_lun; 671 struct list_head alua_port_list; 672 struct list_head ua_list; 673 }; 674 675 struct se_dev_attrib { 676 int emulate_model_alias; 677 int emulate_dpo; 678 int emulate_fua_write; 679 int emulate_fua_read; 680 int emulate_write_cache; 681 int emulate_ua_intlck_ctrl; 682 int emulate_tas; 683 int emulate_tpu; 684 int emulate_tpws; 685 int emulate_caw; 686 int emulate_3pc; 687 int pi_prot_format; 688 enum target_prot_type pi_prot_type; 689 enum target_prot_type hw_pi_prot_type; 690 int enforce_pr_isids; 691 int force_pr_aptpl; 692 int is_nonrot; 693 int emulate_rest_reord; 694 u32 hw_block_size; 695 u32 block_size; 696 u32 hw_max_sectors; 697 u32 fabric_max_sectors; 698 u32 optimal_sectors; 699 u32 hw_queue_depth; 700 u32 queue_depth; 701 u32 max_unmap_lba_count; 702 u32 max_unmap_block_desc_count; 703 u32 unmap_granularity; 704 u32 unmap_granularity_alignment; 705 u32 max_write_same_len; 706 u32 max_bytes_per_io; 707 struct se_device *da_dev; 708 struct config_group da_group; 709 }; 710 711 struct se_port_stat_grps { 712 struct config_group stat_group; 713 struct config_group scsi_port_group; 714 struct config_group scsi_tgt_port_group; 715 struct config_group scsi_transport_group; 716 }; 717 718 struct se_lun { 719 #define SE_LUN_LINK_MAGIC 0xffff7771 720 u32 lun_link_magic; 721 /* See transport_lun_status_table */ 722 enum transport_lun_status_table lun_status; 723 u32 lun_access; 724 u32 lun_flags; 725 u32 unpacked_lun; 726 atomic_t lun_acl_count; 727 spinlock_t lun_acl_lock; 728 spinlock_t lun_sep_lock; 729 struct completion lun_shutdown_comp; 730 struct list_head lun_acl_list; 731 struct se_device *lun_se_dev; 732 struct se_port *lun_sep; 733 struct config_group lun_group; 734 struct se_port_stat_grps port_stat_grps; 735 struct completion lun_ref_comp; 736 struct percpu_ref lun_ref; 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 u32 dev_port_count; 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_id; 774 atomic_t dev_ordered_sync; 775 atomic_t dev_qf_count; 776 int export_count; 777 spinlock_t delayed_cmd_lock; 778 spinlock_t execute_task_lock; 779 spinlock_t dev_reservation_lock; 780 unsigned int dev_reservation_flags; 781 #define DRF_SPC2_RESERVATIONS 0x00000001 782 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 783 spinlock_t se_port_lock; 784 spinlock_t se_tmr_lock; 785 spinlock_t qf_cmd_lock; 786 struct semaphore caw_sem; 787 /* Used for legacy SPC-2 reservationsa */ 788 struct se_node_acl *dev_reserved_node_acl; 789 /* Used for ALUA Logical Unit Group membership */ 790 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 791 /* Used for SPC-3 Persistent Reservations */ 792 struct t10_pr_registration *dev_pr_res_holder; 793 struct list_head dev_sep_list; 794 struct list_head dev_tmr_list; 795 struct workqueue_struct *tmr_wq; 796 struct work_struct qf_work_queue; 797 struct list_head delayed_cmd_list; 798 struct list_head state_list; 799 struct list_head qf_cmd_list; 800 struct list_head g_dev_node; 801 /* Pointer to associated SE HBA */ 802 struct se_hba *se_hba; 803 /* T10 Inquiry and VPD WWN Information */ 804 struct t10_wwn t10_wwn; 805 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 806 struct t10_alua t10_alua; 807 /* T10 SPC-2 + SPC-3 Reservations */ 808 struct t10_reservation t10_pr; 809 struct se_dev_attrib dev_attrib; 810 struct config_group dev_group; 811 struct config_group dev_pr_group; 812 struct se_dev_stat_grps dev_stat_grps; 813 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 814 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 815 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 816 unsigned char udev_path[SE_UDEV_PATH_LEN]; 817 /* Pointer to template of function pointers for transport */ 818 struct se_subsystem_api *transport; 819 /* Linked list for struct se_hba struct se_device list */ 820 struct list_head dev_list; 821 struct se_lun xcopy_lun; 822 /* Protection Information */ 823 int prot_length; 824 }; 825 826 struct se_hba { 827 u16 hba_tpgt; 828 u32 hba_id; 829 /* See hba_flags_table */ 830 u32 hba_flags; 831 /* Virtual iSCSI devices attached. */ 832 u32 dev_count; 833 u32 hba_index; 834 /* Pointer to transport specific host structure. */ 835 void *hba_ptr; 836 struct list_head hba_node; 837 spinlock_t device_lock; 838 struct config_group hba_group; 839 struct mutex hba_access_mutex; 840 struct se_subsystem_api *transport; 841 }; 842 843 struct scsi_port_stats { 844 u64 cmd_pdus; 845 u64 tx_data_octets; 846 u64 rx_data_octets; 847 }; 848 849 struct se_port { 850 /* RELATIVE TARGET PORT IDENTIFER */ 851 u16 sep_rtpi; 852 int sep_tg_pt_secondary_stat; 853 int sep_tg_pt_secondary_write_md; 854 u32 sep_index; 855 struct scsi_port_stats sep_stats; 856 /* Used for ALUA Target Port Groups membership */ 857 atomic_t sep_tg_pt_secondary_offline; 858 /* Used for PR ALL_TG_PT=1 */ 859 atomic_t sep_tg_pt_ref_cnt; 860 spinlock_t sep_alua_lock; 861 struct mutex sep_tg_pt_md_mutex; 862 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 863 struct se_lun *sep_lun; 864 struct se_portal_group *sep_tpg; 865 struct list_head sep_alua_list; 866 struct list_head sep_list; 867 }; 868 869 struct se_tpg_np { 870 struct se_portal_group *tpg_np_parent; 871 struct config_group tpg_np_group; 872 }; 873 874 struct se_portal_group { 875 /* Type of target portal group, see transport_tpg_type_table */ 876 enum transport_tpg_type_table se_tpg_type; 877 /* Number of ACLed Initiator Nodes for this TPG */ 878 u32 num_node_acls; 879 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 880 atomic_t tpg_pr_ref_count; 881 /* Spinlock for adding/removing ACLed Nodes */ 882 spinlock_t acl_node_lock; 883 /* Spinlock for adding/removing sessions */ 884 spinlock_t session_lock; 885 spinlock_t tpg_lun_lock; 886 /* Pointer to $FABRIC_MOD portal group */ 887 void *se_tpg_fabric_ptr; 888 struct list_head se_tpg_node; 889 /* linked list for initiator ACL list */ 890 struct list_head acl_node_list; 891 struct se_lun **tpg_lun_list; 892 struct se_lun tpg_virt_lun0; 893 /* List of TCM sessions associated wth this TPG */ 894 struct list_head tpg_sess_list; 895 /* Pointer to $FABRIC_MOD dependent code */ 896 struct target_core_fabric_ops *se_tpg_tfo; 897 struct se_wwn *se_tpg_wwn; 898 struct config_group tpg_group; 899 struct config_group *tpg_default_groups[7]; 900 struct config_group tpg_lun_group; 901 struct config_group tpg_np_group; 902 struct config_group tpg_acl_group; 903 struct config_group tpg_attrib_group; 904 struct config_group tpg_auth_group; 905 struct config_group tpg_param_group; 906 }; 907 908 struct se_wwn { 909 struct target_fabric_configfs *wwn_tf; 910 struct config_group wwn_group; 911 struct config_group *wwn_default_groups[2]; 912 struct config_group fabric_stat_group; 913 }; 914 915 static inline void atomic_inc_mb(atomic_t *v) 916 { 917 smp_mb__before_atomic(); 918 atomic_inc(v); 919 smp_mb__after_atomic(); 920 } 921 922 static inline void atomic_dec_mb(atomic_t *v) 923 { 924 smp_mb__before_atomic(); 925 atomic_dec(v); 926 smp_mb__after_atomic(); 927 } 928 929 #endif /* TARGET_CORE_BASE_H */ 930