1 #ifndef TARGET_CORE_BASE_H 2 #define TARGET_CORE_BASE_H 3 4 #include <linux/in.h> 5 #include <linux/configfs.h> 6 #include <linux/dma-mapping.h> 7 #include <linux/blkdev.h> 8 #include <scsi/scsi_cmnd.h> 9 #include <net/sock.h> 10 #include <net/tcp.h> 11 12 #define TARGET_CORE_MOD_VERSION "v4.1.0-rc2-ml" 13 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION 14 15 /* Maximum Number of LUNs per Target Portal Group */ 16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */ 17 #define TRANSPORT_MAX_LUNS_PER_TPG 256 18 /* 19 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code. 20 * 21 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and 22 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use 23 * 16-byte CDBs by default and require an extra allocation for 24 * 32-byte CDBs to because of legacy issues. 25 * 26 * Within TCM Core there are no such legacy limitiations, so we go ahead 27 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size() 28 * within all TCM Core and subsystem plugin code. 29 */ 30 #define TCM_MAX_COMMAND_SIZE 32 31 /* 32 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently 33 * defined 96, but the real limit is 252 (or 260 including the header) 34 */ 35 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE 36 /* Used by transport_send_check_condition_and_sense() */ 37 #define SPC_SENSE_KEY_OFFSET 2 38 #define SPC_ADD_SENSE_LEN_OFFSET 7 39 #define SPC_ASC_KEY_OFFSET 12 40 #define SPC_ASCQ_KEY_OFFSET 13 41 #define TRANSPORT_IQN_LEN 224 42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ 43 #define LU_GROUP_NAME_BUF 256 44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ 45 #define TG_PT_GROUP_NAME_BUF 256 46 /* Used to parse VPD into struct t10_vpd */ 47 #define VPD_TMP_BUF_SIZE 128 48 /* Used by transport_generic_cmd_sequencer() */ 49 #define READ_BLOCK_LEN 6 50 #define READ_CAP_LEN 8 51 #define READ_POSITION_LEN 20 52 #define INQUIRY_LEN 36 53 /* Used by transport_get_inquiry_vpd_serial() */ 54 #define INQUIRY_VPD_SERIAL_LEN 254 55 /* Used by transport_get_inquiry_vpd_device_ident() */ 56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 57 58 /* Attempts before moving from SHORT to LONG */ 59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ 61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ 62 63 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ 64 65 /* 66 * struct se_subsystem_dev->su_dev_flags 67 */ 68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001 69 #define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002 70 #define SDF_USING_UDEV_PATH 0x00000004 71 #define SDF_USING_ALIAS 0x00000008 72 73 /* 74 * struct se_device->dev_flags 75 */ 76 #define DF_SPC2_RESERVATIONS 0x00000001 77 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 78 79 /* struct se_dev_attrib sanity values */ 80 /* Default max_unmap_lba_count */ 81 #define DA_MAX_UNMAP_LBA_COUNT 0 82 /* Default max_unmap_block_desc_count */ 83 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 84 /* Default unmap_granularity */ 85 #define DA_UNMAP_GRANULARITY_DEFAULT 0 86 /* Default unmap_granularity_alignment */ 87 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 88 /* Default max transfer length */ 89 #define DA_FABRIC_MAX_SECTORS 8192 90 /* Emulation for Direct Page Out */ 91 #define DA_EMULATE_DPO 0 92 /* Emulation for Forced Unit Access WRITEs */ 93 #define DA_EMULATE_FUA_WRITE 1 94 /* Emulation for Forced Unit Access READs */ 95 #define DA_EMULATE_FUA_READ 0 96 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 97 #define DA_EMULATE_WRITE_CACHE 0 98 /* Emulation for UNIT ATTENTION Interlock Control */ 99 #define DA_EMULATE_UA_INTLLCK_CTRL 0 100 /* Emulation for TASK_ABORTED status (TAS) by default */ 101 #define DA_EMULATE_TAS 1 102 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 103 #define DA_EMULATE_TPU 0 104 /* 105 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 106 * block/blk-lib.c:blkdev_issue_discard() 107 */ 108 #define DA_EMULATE_TPWS 0 109 /* No Emulation for PSCSI by default */ 110 #define DA_EMULATE_RESERVATIONS 0 111 /* No Emulation for PSCSI by default */ 112 #define DA_EMULATE_ALUA 0 113 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 114 #define DA_ENFORCE_PR_ISIDS 1 115 #define DA_STATUS_MAX_SECTORS_MIN 16 116 #define DA_STATUS_MAX_SECTORS_MAX 8192 117 /* By default don't report non-rotating (solid state) medium */ 118 #define DA_IS_NONROT 0 119 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 120 #define DA_EMULATE_REST_REORD 0 121 122 #define SE_INQUIRY_BUF 512 123 #define SE_MODE_PAGE_BUF 512 124 125 /* struct se_hba->hba_flags */ 126 enum hba_flags_table { 127 HBA_FLAGS_INTERNAL_USE = 0x01, 128 HBA_FLAGS_PSCSI_MODE = 0x02, 129 }; 130 131 /* struct se_lun->lun_status */ 132 enum transport_lun_status_table { 133 TRANSPORT_LUN_STATUS_FREE = 0, 134 TRANSPORT_LUN_STATUS_ACTIVE = 1, 135 }; 136 137 /* struct se_portal_group->se_tpg_type */ 138 enum transport_tpg_type_table { 139 TRANSPORT_TPG_TYPE_NORMAL = 0, 140 TRANSPORT_TPG_TYPE_DISCOVERY = 1, 141 }; 142 143 /* Special transport agnostic struct se_cmd->t_states */ 144 enum transport_state_table { 145 TRANSPORT_NO_STATE = 0, 146 TRANSPORT_NEW_CMD = 1, 147 TRANSPORT_WRITE_PENDING = 3, 148 TRANSPORT_PROCESSING = 5, 149 TRANSPORT_COMPLETE = 6, 150 TRANSPORT_ISTATE_PROCESSING = 11, 151 TRANSPORT_COMPLETE_QF_WP = 18, 152 TRANSPORT_COMPLETE_QF_OK = 19, 153 }; 154 155 /* Used for struct se_cmd->se_cmd_flags */ 156 enum se_cmd_flags_table { 157 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 158 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 159 SCF_EMULATED_TASK_SENSE = 0x00000004, 160 SCF_SCSI_DATA_CDB = 0x00000008, 161 SCF_SCSI_TMR_CDB = 0x00000010, 162 SCF_SCSI_CDB_EXCEPTION = 0x00000020, 163 SCF_SCSI_RESERVATION_CONFLICT = 0x00000040, 164 SCF_FUA = 0x00000080, 165 SCF_SE_LUN_CMD = 0x00000100, 166 SCF_BIDI = 0x00000400, 167 SCF_SENT_CHECK_CONDITION = 0x00000800, 168 SCF_OVERFLOW_BIT = 0x00001000, 169 SCF_UNDERFLOW_BIT = 0x00002000, 170 SCF_SENT_DELAYED_TAS = 0x00004000, 171 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 172 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 173 SCF_ACK_KREF = 0x00040000, 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 /* struct se_device->dev_status */ 185 enum transport_device_status_table { 186 TRANSPORT_DEVICE_ACTIVATED = 0x01, 187 TRANSPORT_DEVICE_DEACTIVATED = 0x02, 188 TRANSPORT_DEVICE_QUEUE_FULL = 0x04, 189 TRANSPORT_DEVICE_SHUTDOWN = 0x08, 190 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10, 191 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20, 192 }; 193 194 /* 195 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason 196 * to signal which ASC/ASCQ sense payload should be built. 197 */ 198 enum tcm_sense_reason_table { 199 TCM_NON_EXISTENT_LUN = 0x01, 200 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02, 201 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03, 202 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04, 203 TCM_SERVICE_CRC_ERROR = 0x05, 204 TCM_SNACK_REJECTED = 0x06, 205 TCM_SECTOR_COUNT_TOO_MANY = 0x07, 206 TCM_INVALID_CDB_FIELD = 0x08, 207 TCM_INVALID_PARAMETER_LIST = 0x09, 208 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a, 209 TCM_UNKNOWN_MODE_PAGE = 0x0b, 210 TCM_WRITE_PROTECTED = 0x0c, 211 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d, 212 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e, 213 TCM_CHECK_CONDITION_NOT_READY = 0x0f, 214 TCM_RESERVATION_CONFLICT = 0x10, 215 TCM_ADDRESS_OUT_OF_RANGE = 0x11, 216 }; 217 218 enum target_sc_flags_table { 219 TARGET_SCF_BIDI_OP = 0x01, 220 TARGET_SCF_ACK_KREF = 0x02, 221 TARGET_SCF_UNKNOWN_SIZE = 0x04, 222 }; 223 224 /* fabric independent task management function values */ 225 enum tcm_tmreq_table { 226 TMR_ABORT_TASK = 1, 227 TMR_ABORT_TASK_SET = 2, 228 TMR_CLEAR_ACA = 3, 229 TMR_CLEAR_TASK_SET = 4, 230 TMR_LUN_RESET = 5, 231 TMR_TARGET_WARM_RESET = 6, 232 TMR_TARGET_COLD_RESET = 7, 233 TMR_FABRIC_TMR = 255, 234 }; 235 236 /* fabric independent task management response values */ 237 enum tcm_tmrsp_table { 238 TMR_FUNCTION_COMPLETE = 0, 239 TMR_TASK_DOES_NOT_EXIST = 1, 240 TMR_LUN_DOES_NOT_EXIST = 2, 241 TMR_TASK_STILL_ALLEGIANT = 3, 242 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4, 243 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5, 244 TMR_FUNCTION_AUTHORIZATION_FAILED = 6, 245 TMR_FUNCTION_REJECTED = 255, 246 }; 247 248 struct se_obj { 249 atomic_t obj_access_count; 250 }; 251 252 /* 253 * Used by TCM Core internally to signal if ALUA emulation is enabled or 254 * disabled, or running in with TCM/pSCSI passthrough mode 255 */ 256 typedef enum { 257 SPC_ALUA_PASSTHROUGH, 258 SPC2_ALUA_DISABLED, 259 SPC3_ALUA_EMULATED 260 } t10_alua_index_t; 261 262 /* 263 * Used by TCM Core internally to signal if SAM Task Attribute emulation 264 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode 265 */ 266 typedef enum { 267 SAM_TASK_ATTR_PASSTHROUGH, 268 SAM_TASK_ATTR_UNTAGGED, 269 SAM_TASK_ATTR_EMULATED 270 } t10_task_attr_index_t; 271 272 /* 273 * Used for target SCSI statistics 274 */ 275 typedef enum { 276 SCSI_INST_INDEX, 277 SCSI_DEVICE_INDEX, 278 SCSI_AUTH_INTR_INDEX, 279 SCSI_INDEX_TYPE_MAX 280 } scsi_index_t; 281 282 struct se_cmd; 283 284 struct t10_alua { 285 t10_alua_index_t alua_type; 286 /* ALUA Target Port Group ID */ 287 u16 alua_tg_pt_gps_counter; 288 u32 alua_tg_pt_gps_count; 289 spinlock_t tg_pt_gps_lock; 290 struct se_subsystem_dev *t10_sub_dev; 291 /* Used for default ALUA Target Port Group */ 292 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 293 /* Used for default ALUA Target Port Group ConfigFS group */ 294 struct config_group alua_tg_pt_gps_group; 295 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *); 296 struct list_head tg_pt_gps_list; 297 }; 298 299 struct t10_alua_lu_gp { 300 u16 lu_gp_id; 301 int lu_gp_valid_id; 302 u32 lu_gp_members; 303 atomic_t lu_gp_ref_cnt; 304 spinlock_t lu_gp_lock; 305 struct config_group lu_gp_group; 306 struct list_head lu_gp_node; 307 struct list_head lu_gp_mem_list; 308 }; 309 310 struct t10_alua_lu_gp_member { 311 bool lu_gp_assoc; 312 atomic_t lu_gp_mem_ref_cnt; 313 spinlock_t lu_gp_mem_lock; 314 struct t10_alua_lu_gp *lu_gp; 315 struct se_device *lu_gp_mem_dev; 316 struct list_head lu_gp_mem_list; 317 }; 318 319 struct t10_alua_tg_pt_gp { 320 u16 tg_pt_gp_id; 321 int tg_pt_gp_valid_id; 322 int tg_pt_gp_alua_access_status; 323 int tg_pt_gp_alua_access_type; 324 int tg_pt_gp_nonop_delay_msecs; 325 int tg_pt_gp_trans_delay_msecs; 326 int tg_pt_gp_implict_trans_secs; 327 int tg_pt_gp_pref; 328 int tg_pt_gp_write_metadata; 329 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */ 330 #define ALUA_MD_BUF_LEN 1024 331 u32 tg_pt_gp_md_buf_len; 332 u32 tg_pt_gp_members; 333 atomic_t tg_pt_gp_alua_access_state; 334 atomic_t tg_pt_gp_ref_cnt; 335 spinlock_t tg_pt_gp_lock; 336 struct mutex tg_pt_gp_md_mutex; 337 struct se_subsystem_dev *tg_pt_gp_su_dev; 338 struct config_group tg_pt_gp_group; 339 struct list_head tg_pt_gp_list; 340 struct list_head tg_pt_gp_mem_list; 341 }; 342 343 struct t10_alua_tg_pt_gp_member { 344 bool tg_pt_gp_assoc; 345 atomic_t tg_pt_gp_mem_ref_cnt; 346 spinlock_t tg_pt_gp_mem_lock; 347 struct t10_alua_tg_pt_gp *tg_pt_gp; 348 struct se_port *tg_pt; 349 struct list_head tg_pt_gp_mem_list; 350 }; 351 352 struct t10_vpd { 353 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 354 int protocol_identifier_set; 355 u32 protocol_identifier; 356 u32 device_identifier_code_set; 357 u32 association; 358 u32 device_identifier_type; 359 struct list_head vpd_list; 360 }; 361 362 struct t10_wwn { 363 char vendor[8]; 364 char model[16]; 365 char revision[4]; 366 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 367 spinlock_t t10_vpd_lock; 368 struct se_subsystem_dev *t10_sub_dev; 369 struct config_group t10_wwn_group; 370 struct list_head t10_vpd_list; 371 }; 372 373 374 /* 375 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations 376 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough 377 * mode 378 */ 379 typedef enum { 380 SPC_PASSTHROUGH, 381 SPC2_RESERVATIONS, 382 SPC3_PERSISTENT_RESERVATIONS 383 } t10_reservations_index_t; 384 385 struct t10_pr_registration { 386 /* Used for fabrics that contain WWN+ISID */ 387 #define PR_REG_ISID_LEN 16 388 /* PR_REG_ISID_LEN + ',i,0x' */ 389 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 390 char pr_reg_isid[PR_REG_ISID_LEN]; 391 /* Used during APTPL metadata reading */ 392 #define PR_APTPL_MAX_IPORT_LEN 256 393 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 394 /* Used during APTPL metadata reading */ 395 #define PR_APTPL_MAX_TPORT_LEN 256 396 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 397 /* For writing out live meta data */ 398 unsigned char *pr_aptpl_buf; 399 u16 pr_aptpl_rpti; 400 u16 pr_reg_tpgt; 401 /* Reservation effects all target ports */ 402 int pr_reg_all_tg_pt; 403 /* Activate Persistence across Target Power Loss */ 404 int pr_reg_aptpl; 405 int pr_res_holder; 406 int pr_res_type; 407 int pr_res_scope; 408 /* Used for fabric initiator WWPNs using a ISID */ 409 bool isid_present_at_reg; 410 u32 pr_res_mapped_lun; 411 u32 pr_aptpl_target_lun; 412 u32 pr_res_generation; 413 u64 pr_reg_bin_isid; 414 u64 pr_res_key; 415 atomic_t pr_res_holders; 416 struct se_node_acl *pr_reg_nacl; 417 struct se_dev_entry *pr_reg_deve; 418 struct se_lun *pr_reg_tg_pt_lun; 419 struct list_head pr_reg_list; 420 struct list_head pr_reg_abort_list; 421 struct list_head pr_reg_aptpl_list; 422 struct list_head pr_reg_atp_list; 423 struct list_head pr_reg_atp_mem_list; 424 }; 425 426 /* 427 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, 428 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: 429 * core_setup_reservations() 430 */ 431 struct t10_reservation_ops { 432 int (*t10_reservation_check)(struct se_cmd *, u32 *); 433 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32); 434 int (*t10_pr_register)(struct se_cmd *); 435 int (*t10_pr_clear)(struct se_cmd *); 436 }; 437 438 struct t10_reservation { 439 /* Reservation effects all target ports */ 440 int pr_all_tg_pt; 441 /* Activate Persistence across Target Power Loss enabled 442 * for SCSI device */ 443 int pr_aptpl_active; 444 /* Used by struct t10_reservation->pr_aptpl_buf_len */ 445 #define PR_APTPL_BUF_LEN 8192 446 u32 pr_aptpl_buf_len; 447 u32 pr_generation; 448 t10_reservations_index_t res_type; 449 spinlock_t registration_lock; 450 spinlock_t aptpl_reg_lock; 451 /* 452 * This will always be set by one individual I_T Nexus. 453 * However with all_tg_pt=1, other I_T Nexus from the 454 * same initiator can access PR reg/res info on a different 455 * target port. 456 * 457 * There is also the 'All Registrants' case, where there is 458 * a single *pr_res_holder of the reservation, but all 459 * registrations are considered reservation holders. 460 */ 461 struct se_node_acl *pr_res_holder; 462 struct list_head registration_list; 463 struct list_head aptpl_reg_list; 464 struct t10_reservation_ops pr_ops; 465 }; 466 467 struct se_tmr_req { 468 /* Task Management function to be performed */ 469 u8 function; 470 /* Task Management response to send */ 471 u8 response; 472 int call_transport; 473 /* Reference to ITT that Task Mgmt should be performed */ 474 u32 ref_task_tag; 475 void *fabric_tmr_ptr; 476 struct se_cmd *task_cmd; 477 struct se_device *tmr_dev; 478 struct se_lun *tmr_lun; 479 struct list_head tmr_list; 480 }; 481 482 struct se_cmd { 483 /* SAM response code being sent to initiator */ 484 u8 scsi_status; 485 u8 scsi_asc; 486 u8 scsi_ascq; 487 u8 scsi_sense_reason; 488 u16 scsi_sense_length; 489 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 490 int alua_nonop_delay; 491 /* See include/linux/dma-mapping.h */ 492 enum dma_data_direction data_direction; 493 /* For SAM Task Attribute */ 494 int sam_task_attr; 495 /* Transport protocol dependent state, see transport_state_table */ 496 enum transport_state_table t_state; 497 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */ 498 unsigned check_release:1; 499 unsigned cmd_wait_set:1; 500 unsigned unknown_data_length:1; 501 /* See se_cmd_flags_table */ 502 u32 se_cmd_flags; 503 u32 se_ordered_id; 504 /* Total size in bytes associated with command */ 505 u32 data_length; 506 u32 residual_count; 507 u32 orig_fe_lun; 508 /* Persistent Reservation key */ 509 u64 pr_res_key; 510 /* Used for sense data */ 511 void *sense_buffer; 512 struct list_head se_delayed_node; 513 struct list_head se_lun_node; 514 struct list_head se_qf_node; 515 struct se_device *se_dev; 516 struct se_dev_entry *se_deve; 517 struct se_lun *se_lun; 518 /* Only used for internal passthrough and legacy TCM fabric modules */ 519 struct se_session *se_sess; 520 struct se_tmr_req *se_tmr_req; 521 struct list_head se_cmd_list; 522 struct completion cmd_wait_comp; 523 struct kref cmd_kref; 524 struct target_core_fabric_ops *se_tfo; 525 int (*execute_cmd)(struct se_cmd *); 526 void (*transport_complete_callback)(struct se_cmd *); 527 528 unsigned char *t_task_cdb; 529 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 530 unsigned long long t_task_lba; 531 atomic_t t_fe_count; 532 unsigned int transport_state; 533 #define CMD_T_ABORTED (1 << 0) 534 #define CMD_T_ACTIVE (1 << 1) 535 #define CMD_T_COMPLETE (1 << 2) 536 #define CMD_T_QUEUED (1 << 3) 537 #define CMD_T_SENT (1 << 4) 538 #define CMD_T_STOP (1 << 5) 539 #define CMD_T_FAILED (1 << 6) 540 #define CMD_T_LUN_STOP (1 << 7) 541 #define CMD_T_LUN_FE_STOP (1 << 8) 542 #define CMD_T_DEV_ACTIVE (1 << 9) 543 #define CMD_T_REQUEST_STOP (1 << 10) 544 #define CMD_T_BUSY (1 << 11) 545 spinlock_t t_state_lock; 546 struct completion t_transport_stop_comp; 547 struct completion transport_lun_fe_stop_comp; 548 struct completion transport_lun_stop_comp; 549 550 struct work_struct work; 551 552 struct scatterlist *t_data_sg; 553 unsigned int t_data_nents; 554 void *t_data_vmap; 555 struct scatterlist *t_bidi_data_sg; 556 unsigned int t_bidi_data_nents; 557 558 struct list_head state_list; 559 bool state_active; 560 561 /* old task stop completion, consider merging with some of the above */ 562 struct completion task_stop_comp; 563 564 /* backend private data */ 565 void *priv; 566 }; 567 568 struct se_ua { 569 u8 ua_asc; 570 u8 ua_ascq; 571 struct se_node_acl *ua_nacl; 572 struct list_head ua_dev_list; 573 struct list_head ua_nacl_list; 574 }; 575 576 struct se_node_acl { 577 char initiatorname[TRANSPORT_IQN_LEN]; 578 /* Used to signal demo mode created ACL, disabled by default */ 579 bool dynamic_node_acl; 580 bool acl_stop:1; 581 u32 queue_depth; 582 u32 acl_index; 583 u64 num_cmds; 584 u64 read_bytes; 585 u64 write_bytes; 586 spinlock_t stats_lock; 587 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 588 atomic_t acl_pr_ref_count; 589 struct se_dev_entry **device_list; 590 struct se_session *nacl_sess; 591 struct se_portal_group *se_tpg; 592 spinlock_t device_list_lock; 593 spinlock_t nacl_sess_lock; 594 struct config_group acl_group; 595 struct config_group acl_attrib_group; 596 struct config_group acl_auth_group; 597 struct config_group acl_param_group; 598 struct config_group acl_fabric_stat_group; 599 struct config_group *acl_default_groups[5]; 600 struct list_head acl_list; 601 struct list_head acl_sess_list; 602 struct completion acl_free_comp; 603 struct kref acl_kref; 604 }; 605 606 struct se_session { 607 unsigned sess_tearing_down:1; 608 u64 sess_bin_isid; 609 struct se_node_acl *se_node_acl; 610 struct se_portal_group *se_tpg; 611 void *fabric_sess_ptr; 612 struct list_head sess_list; 613 struct list_head sess_acl_list; 614 struct list_head sess_cmd_list; 615 spinlock_t sess_cmd_lock; 616 struct kref sess_kref; 617 }; 618 619 struct se_device; 620 struct se_transform_info; 621 struct scatterlist; 622 623 struct se_ml_stat_grps { 624 struct config_group stat_group; 625 struct config_group scsi_auth_intr_group; 626 struct config_group scsi_att_intr_port_group; 627 }; 628 629 struct se_lun_acl { 630 char initiatorname[TRANSPORT_IQN_LEN]; 631 u32 mapped_lun; 632 struct se_node_acl *se_lun_nacl; 633 struct se_lun *se_lun; 634 struct list_head lacl_list; 635 struct config_group se_lun_group; 636 struct se_ml_stat_grps ml_stat_grps; 637 }; 638 639 struct se_dev_entry { 640 bool def_pr_registered; 641 /* See transport_lunflags_table */ 642 u32 lun_flags; 643 u32 deve_cmds; 644 u32 mapped_lun; 645 u32 average_bytes; 646 u32 last_byte_count; 647 u32 total_cmds; 648 u32 total_bytes; 649 u64 pr_res_key; 650 u64 creation_time; 651 u32 attach_count; 652 u64 read_bytes; 653 u64 write_bytes; 654 atomic_t ua_count; 655 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 656 atomic_t pr_ref_count; 657 struct se_lun_acl *se_lun_acl; 658 spinlock_t ua_lock; 659 struct se_lun *se_lun; 660 struct list_head alua_port_list; 661 struct list_head ua_list; 662 }; 663 664 struct se_dev_limits { 665 /* Max supported HW queue depth */ 666 u32 hw_queue_depth; 667 /* Max supported virtual queue depth */ 668 u32 queue_depth; 669 /* From include/linux/blkdev.h for the other HW/SW limits. */ 670 struct queue_limits limits; 671 }; 672 673 struct se_dev_attrib { 674 int emulate_dpo; 675 int emulate_fua_write; 676 int emulate_fua_read; 677 int emulate_write_cache; 678 int emulate_ua_intlck_ctrl; 679 int emulate_tas; 680 int emulate_tpu; 681 int emulate_tpws; 682 int emulate_reservations; 683 int emulate_alua; 684 int enforce_pr_isids; 685 int is_nonrot; 686 int emulate_rest_reord; 687 u32 hw_block_size; 688 u32 block_size; 689 u32 hw_max_sectors; 690 u32 fabric_max_sectors; 691 u32 optimal_sectors; 692 u32 hw_queue_depth; 693 u32 queue_depth; 694 u32 max_unmap_lba_count; 695 u32 max_unmap_block_desc_count; 696 u32 unmap_granularity; 697 u32 unmap_granularity_alignment; 698 struct se_subsystem_dev *da_sub_dev; 699 struct config_group da_group; 700 }; 701 702 struct se_dev_stat_grps { 703 struct config_group stat_group; 704 struct config_group scsi_dev_group; 705 struct config_group scsi_tgt_dev_group; 706 struct config_group scsi_lu_group; 707 }; 708 709 struct se_subsystem_dev { 710 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */ 711 #define SE_DEV_ALIAS_LEN 512 712 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN]; 713 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */ 714 #define SE_UDEV_PATH_LEN 512 715 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN]; 716 u32 su_dev_flags; 717 struct se_hba *se_dev_hba; 718 struct se_device *se_dev_ptr; 719 struct se_dev_attrib se_dev_attrib; 720 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 721 struct t10_alua t10_alua; 722 /* T10 Inquiry and VPD WWN Information */ 723 struct t10_wwn t10_wwn; 724 /* T10 SPC-2 + SPC-3 Reservations */ 725 struct t10_reservation t10_pr; 726 spinlock_t se_dev_lock; 727 void *se_dev_su_ptr; 728 struct config_group se_dev_group; 729 /* For T10 Reservations */ 730 struct config_group se_dev_pr_group; 731 /* For target_core_stat.c groups */ 732 struct se_dev_stat_grps dev_stat_grps; 733 }; 734 735 struct se_device { 736 /* RELATIVE TARGET PORT IDENTIFER Counter */ 737 u16 dev_rpti_counter; 738 /* Used for SAM Task Attribute ordering */ 739 u32 dev_cur_ordered_id; 740 u32 dev_flags; 741 u32 dev_port_count; 742 /* See transport_device_status_table */ 743 u32 dev_status; 744 /* Physical device queue depth */ 745 u32 queue_depth; 746 /* Used for SPC-2 reservations enforce of ISIDs */ 747 u64 dev_res_bin_isid; 748 t10_task_attr_index_t dev_task_attr_type; 749 /* Pointer to transport specific device structure */ 750 void *dev_ptr; 751 u32 dev_index; 752 u64 creation_time; 753 u32 num_resets; 754 u64 num_cmds; 755 u64 read_bytes; 756 u64 write_bytes; 757 spinlock_t stats_lock; 758 /* Active commands on this virtual SE device */ 759 atomic_t simple_cmds; 760 atomic_t dev_ordered_id; 761 atomic_t dev_ordered_sync; 762 atomic_t dev_qf_count; 763 struct se_obj dev_obj; 764 struct se_obj dev_access_obj; 765 struct se_obj dev_export_obj; 766 spinlock_t delayed_cmd_lock; 767 spinlock_t execute_task_lock; 768 spinlock_t dev_reservation_lock; 769 spinlock_t dev_status_lock; 770 spinlock_t se_port_lock; 771 spinlock_t se_tmr_lock; 772 spinlock_t qf_cmd_lock; 773 /* Used for legacy SPC-2 reservationsa */ 774 struct se_node_acl *dev_reserved_node_acl; 775 /* Used for ALUA Logical Unit Group membership */ 776 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 777 /* Used for SPC-3 Persistent Reservations */ 778 struct t10_pr_registration *dev_pr_res_holder; 779 struct list_head dev_sep_list; 780 struct list_head dev_tmr_list; 781 struct workqueue_struct *tmr_wq; 782 struct work_struct qf_work_queue; 783 struct list_head delayed_cmd_list; 784 struct list_head state_list; 785 struct list_head qf_cmd_list; 786 /* Pointer to associated SE HBA */ 787 struct se_hba *se_hba; 788 struct se_subsystem_dev *se_sub_dev; 789 /* Pointer to template of function pointers for transport */ 790 struct se_subsystem_api *transport; 791 /* Linked list for struct se_hba struct se_device list */ 792 struct list_head dev_list; 793 }; 794 795 struct se_hba { 796 u16 hba_tpgt; 797 u32 hba_id; 798 /* See hba_flags_table */ 799 u32 hba_flags; 800 /* Virtual iSCSI devices attached. */ 801 u32 dev_count; 802 u32 hba_index; 803 /* Pointer to transport specific host structure. */ 804 void *hba_ptr; 805 /* Linked list for struct se_device */ 806 struct list_head hba_dev_list; 807 struct list_head hba_node; 808 spinlock_t device_lock; 809 struct config_group hba_group; 810 struct mutex hba_access_mutex; 811 struct se_subsystem_api *transport; 812 }; 813 814 struct se_port_stat_grps { 815 struct config_group stat_group; 816 struct config_group scsi_port_group; 817 struct config_group scsi_tgt_port_group; 818 struct config_group scsi_transport_group; 819 }; 820 821 struct se_lun { 822 /* See transport_lun_status_table */ 823 enum transport_lun_status_table lun_status; 824 u32 lun_access; 825 u32 lun_flags; 826 u32 unpacked_lun; 827 atomic_t lun_acl_count; 828 spinlock_t lun_acl_lock; 829 spinlock_t lun_cmd_lock; 830 spinlock_t lun_sep_lock; 831 struct completion lun_shutdown_comp; 832 struct list_head lun_cmd_list; 833 struct list_head lun_acl_list; 834 struct se_device *lun_se_dev; 835 struct se_port *lun_sep; 836 struct config_group lun_group; 837 struct se_port_stat_grps port_stat_grps; 838 }; 839 840 struct scsi_port_stats { 841 u64 cmd_pdus; 842 u64 tx_data_octets; 843 u64 rx_data_octets; 844 }; 845 846 struct se_port { 847 /* RELATIVE TARGET PORT IDENTIFER */ 848 u16 sep_rtpi; 849 int sep_tg_pt_secondary_stat; 850 int sep_tg_pt_secondary_write_md; 851 u32 sep_index; 852 struct scsi_port_stats sep_stats; 853 /* Used for ALUA Target Port Groups membership */ 854 atomic_t sep_tg_pt_secondary_offline; 855 /* Used for PR ALL_TG_PT=1 */ 856 atomic_t sep_tg_pt_ref_cnt; 857 spinlock_t sep_alua_lock; 858 struct mutex sep_tg_pt_md_mutex; 859 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 860 struct se_lun *sep_lun; 861 struct se_portal_group *sep_tpg; 862 struct list_head sep_alua_list; 863 struct list_head sep_list; 864 }; 865 866 struct se_tpg_np { 867 struct se_portal_group *tpg_np_parent; 868 struct config_group tpg_np_group; 869 }; 870 871 struct se_portal_group { 872 /* Type of target portal group, see transport_tpg_type_table */ 873 enum transport_tpg_type_table se_tpg_type; 874 /* Number of ACLed Initiator Nodes for this TPG */ 875 u32 num_node_acls; 876 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 877 atomic_t tpg_pr_ref_count; 878 /* Spinlock for adding/removing ACLed Nodes */ 879 spinlock_t acl_node_lock; 880 /* Spinlock for adding/removing sessions */ 881 spinlock_t session_lock; 882 spinlock_t tpg_lun_lock; 883 /* Pointer to $FABRIC_MOD portal group */ 884 void *se_tpg_fabric_ptr; 885 struct list_head se_tpg_node; 886 /* linked list for initiator ACL list */ 887 struct list_head acl_node_list; 888 struct se_lun **tpg_lun_list; 889 struct se_lun tpg_virt_lun0; 890 /* List of TCM sessions associated wth this TPG */ 891 struct list_head tpg_sess_list; 892 /* Pointer to $FABRIC_MOD dependent code */ 893 struct target_core_fabric_ops *se_tpg_tfo; 894 struct se_wwn *se_tpg_wwn; 895 struct config_group tpg_group; 896 struct config_group *tpg_default_groups[6]; 897 struct config_group tpg_lun_group; 898 struct config_group tpg_np_group; 899 struct config_group tpg_acl_group; 900 struct config_group tpg_attrib_group; 901 struct config_group tpg_param_group; 902 }; 903 904 struct se_wwn { 905 struct target_fabric_configfs *wwn_tf; 906 struct config_group wwn_group; 907 struct config_group *wwn_default_groups[2]; 908 struct config_group fabric_stat_group; 909 }; 910 911 #endif /* TARGET_CORE_BASE_H */ 912