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_PROCESS_WRITE = 4, 149 TRANSPORT_PROCESSING = 5, 150 TRANSPORT_COMPLETE = 6, 151 TRANSPORT_PROCESS_TMR = 9, 152 TRANSPORT_ISTATE_PROCESSING = 11, 153 TRANSPORT_NEW_CMD_MAP = 16, 154 TRANSPORT_COMPLETE_QF_WP = 18, 155 TRANSPORT_COMPLETE_QF_OK = 19, 156 }; 157 158 /* Used for struct se_cmd->se_cmd_flags */ 159 enum se_cmd_flags_table { 160 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 161 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 162 SCF_EMULATED_TASK_SENSE = 0x00000004, 163 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008, 164 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010, 165 SCF_SCSI_NON_DATA_CDB = 0x00000020, 166 SCF_SCSI_TMR_CDB = 0x00000040, 167 SCF_SCSI_CDB_EXCEPTION = 0x00000080, 168 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100, 169 SCF_FUA = 0x00000200, 170 SCF_SE_LUN_CMD = 0x00000800, 171 SCF_SE_ALLOW_EOO = 0x00001000, 172 SCF_BIDI = 0x00002000, 173 SCF_SENT_CHECK_CONDITION = 0x00004000, 174 SCF_OVERFLOW_BIT = 0x00008000, 175 SCF_UNDERFLOW_BIT = 0x00010000, 176 SCF_SENT_DELAYED_TAS = 0x00020000, 177 SCF_ALUA_NON_OPTIMIZED = 0x00040000, 178 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000, 179 SCF_UNUSED = 0x00100000, 180 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00200000, 181 SCF_ACK_KREF = 0x00400000, 182 }; 183 184 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */ 185 enum transport_lunflags_table { 186 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00, 187 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01, 188 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02, 189 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04, 190 }; 191 192 /* struct se_device->dev_status */ 193 enum transport_device_status_table { 194 TRANSPORT_DEVICE_ACTIVATED = 0x01, 195 TRANSPORT_DEVICE_DEACTIVATED = 0x02, 196 TRANSPORT_DEVICE_QUEUE_FULL = 0x04, 197 TRANSPORT_DEVICE_SHUTDOWN = 0x08, 198 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10, 199 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20, 200 }; 201 202 /* 203 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason 204 * to signal which ASC/ASCQ sense payload should be built. 205 */ 206 enum tcm_sense_reason_table { 207 TCM_NON_EXISTENT_LUN = 0x01, 208 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02, 209 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03, 210 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04, 211 TCM_SERVICE_CRC_ERROR = 0x05, 212 TCM_SNACK_REJECTED = 0x06, 213 TCM_SECTOR_COUNT_TOO_MANY = 0x07, 214 TCM_INVALID_CDB_FIELD = 0x08, 215 TCM_INVALID_PARAMETER_LIST = 0x09, 216 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a, 217 TCM_UNKNOWN_MODE_PAGE = 0x0b, 218 TCM_WRITE_PROTECTED = 0x0c, 219 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d, 220 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e, 221 TCM_CHECK_CONDITION_NOT_READY = 0x0f, 222 TCM_RESERVATION_CONFLICT = 0x10, 223 }; 224 225 enum target_sc_flags_table { 226 TARGET_SCF_BIDI_OP = 0x01, 227 TARGET_SCF_ACK_KREF = 0x02, 228 TARGET_SCF_UNKNOWN_SIZE = 0x04, 229 }; 230 231 /* fabric independent task management function values */ 232 enum tcm_tmreq_table { 233 TMR_ABORT_TASK = 1, 234 TMR_ABORT_TASK_SET = 2, 235 TMR_CLEAR_ACA = 3, 236 TMR_CLEAR_TASK_SET = 4, 237 TMR_LUN_RESET = 5, 238 TMR_TARGET_WARM_RESET = 6, 239 TMR_TARGET_COLD_RESET = 7, 240 TMR_FABRIC_TMR = 255, 241 }; 242 243 /* fabric independent task management response values */ 244 enum tcm_tmrsp_table { 245 TMR_FUNCTION_COMPLETE = 0, 246 TMR_TASK_DOES_NOT_EXIST = 1, 247 TMR_LUN_DOES_NOT_EXIST = 2, 248 TMR_TASK_STILL_ALLEGIANT = 3, 249 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4, 250 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5, 251 TMR_FUNCTION_AUTHORIZATION_FAILED = 6, 252 TMR_FUNCTION_REJECTED = 255, 253 }; 254 255 struct se_obj { 256 atomic_t obj_access_count; 257 }; 258 259 /* 260 * Used by TCM Core internally to signal if ALUA emulation is enabled or 261 * disabled, or running in with TCM/pSCSI passthrough mode 262 */ 263 typedef enum { 264 SPC_ALUA_PASSTHROUGH, 265 SPC2_ALUA_DISABLED, 266 SPC3_ALUA_EMULATED 267 } t10_alua_index_t; 268 269 /* 270 * Used by TCM Core internally to signal if SAM Task Attribute emulation 271 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode 272 */ 273 typedef enum { 274 SAM_TASK_ATTR_PASSTHROUGH, 275 SAM_TASK_ATTR_UNTAGGED, 276 SAM_TASK_ATTR_EMULATED 277 } t10_task_attr_index_t; 278 279 /* 280 * Used for target SCSI statistics 281 */ 282 typedef enum { 283 SCSI_INST_INDEX, 284 SCSI_DEVICE_INDEX, 285 SCSI_AUTH_INTR_INDEX, 286 SCSI_INDEX_TYPE_MAX 287 } scsi_index_t; 288 289 struct se_cmd; 290 291 struct t10_alua { 292 t10_alua_index_t alua_type; 293 /* ALUA Target Port Group ID */ 294 u16 alua_tg_pt_gps_counter; 295 u32 alua_tg_pt_gps_count; 296 spinlock_t tg_pt_gps_lock; 297 struct se_subsystem_dev *t10_sub_dev; 298 /* Used for default ALUA Target Port Group */ 299 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 300 /* Used for default ALUA Target Port Group ConfigFS group */ 301 struct config_group alua_tg_pt_gps_group; 302 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *); 303 struct list_head tg_pt_gps_list; 304 }; 305 306 struct t10_alua_lu_gp { 307 u16 lu_gp_id; 308 int lu_gp_valid_id; 309 u32 lu_gp_members; 310 atomic_t lu_gp_ref_cnt; 311 spinlock_t lu_gp_lock; 312 struct config_group lu_gp_group; 313 struct list_head lu_gp_node; 314 struct list_head lu_gp_mem_list; 315 }; 316 317 struct t10_alua_lu_gp_member { 318 bool lu_gp_assoc; 319 atomic_t lu_gp_mem_ref_cnt; 320 spinlock_t lu_gp_mem_lock; 321 struct t10_alua_lu_gp *lu_gp; 322 struct se_device *lu_gp_mem_dev; 323 struct list_head lu_gp_mem_list; 324 }; 325 326 struct t10_alua_tg_pt_gp { 327 u16 tg_pt_gp_id; 328 int tg_pt_gp_valid_id; 329 int tg_pt_gp_alua_access_status; 330 int tg_pt_gp_alua_access_type; 331 int tg_pt_gp_nonop_delay_msecs; 332 int tg_pt_gp_trans_delay_msecs; 333 int tg_pt_gp_implict_trans_secs; 334 int tg_pt_gp_pref; 335 int tg_pt_gp_write_metadata; 336 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */ 337 #define ALUA_MD_BUF_LEN 1024 338 u32 tg_pt_gp_md_buf_len; 339 u32 tg_pt_gp_members; 340 atomic_t tg_pt_gp_alua_access_state; 341 atomic_t tg_pt_gp_ref_cnt; 342 spinlock_t tg_pt_gp_lock; 343 struct mutex tg_pt_gp_md_mutex; 344 struct se_subsystem_dev *tg_pt_gp_su_dev; 345 struct config_group tg_pt_gp_group; 346 struct list_head tg_pt_gp_list; 347 struct list_head tg_pt_gp_mem_list; 348 }; 349 350 struct t10_alua_tg_pt_gp_member { 351 bool tg_pt_gp_assoc; 352 atomic_t tg_pt_gp_mem_ref_cnt; 353 spinlock_t tg_pt_gp_mem_lock; 354 struct t10_alua_tg_pt_gp *tg_pt_gp; 355 struct se_port *tg_pt; 356 struct list_head tg_pt_gp_mem_list; 357 }; 358 359 struct t10_vpd { 360 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 361 int protocol_identifier_set; 362 u32 protocol_identifier; 363 u32 device_identifier_code_set; 364 u32 association; 365 u32 device_identifier_type; 366 struct list_head vpd_list; 367 }; 368 369 struct t10_wwn { 370 char vendor[8]; 371 char model[16]; 372 char revision[4]; 373 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 374 spinlock_t t10_vpd_lock; 375 struct se_subsystem_dev *t10_sub_dev; 376 struct config_group t10_wwn_group; 377 struct list_head t10_vpd_list; 378 }; 379 380 381 /* 382 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations 383 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough 384 * mode 385 */ 386 typedef enum { 387 SPC_PASSTHROUGH, 388 SPC2_RESERVATIONS, 389 SPC3_PERSISTENT_RESERVATIONS 390 } t10_reservations_index_t; 391 392 struct t10_pr_registration { 393 /* Used for fabrics that contain WWN+ISID */ 394 #define PR_REG_ISID_LEN 16 395 /* PR_REG_ISID_LEN + ',i,0x' */ 396 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 397 char pr_reg_isid[PR_REG_ISID_LEN]; 398 /* Used during APTPL metadata reading */ 399 #define PR_APTPL_MAX_IPORT_LEN 256 400 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 401 /* Used during APTPL metadata reading */ 402 #define PR_APTPL_MAX_TPORT_LEN 256 403 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 404 /* For writing out live meta data */ 405 unsigned char *pr_aptpl_buf; 406 u16 pr_aptpl_rpti; 407 u16 pr_reg_tpgt; 408 /* Reservation effects all target ports */ 409 int pr_reg_all_tg_pt; 410 /* Activate Persistence across Target Power Loss */ 411 int pr_reg_aptpl; 412 int pr_res_holder; 413 int pr_res_type; 414 int pr_res_scope; 415 /* Used for fabric initiator WWPNs using a ISID */ 416 bool isid_present_at_reg; 417 u32 pr_res_mapped_lun; 418 u32 pr_aptpl_target_lun; 419 u32 pr_res_generation; 420 u64 pr_reg_bin_isid; 421 u64 pr_res_key; 422 atomic_t pr_res_holders; 423 struct se_node_acl *pr_reg_nacl; 424 struct se_dev_entry *pr_reg_deve; 425 struct se_lun *pr_reg_tg_pt_lun; 426 struct list_head pr_reg_list; 427 struct list_head pr_reg_abort_list; 428 struct list_head pr_reg_aptpl_list; 429 struct list_head pr_reg_atp_list; 430 struct list_head pr_reg_atp_mem_list; 431 }; 432 433 /* 434 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, 435 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: 436 * core_setup_reservations() 437 */ 438 struct t10_reservation_ops { 439 int (*t10_reservation_check)(struct se_cmd *, u32 *); 440 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32); 441 int (*t10_pr_register)(struct se_cmd *); 442 int (*t10_pr_clear)(struct se_cmd *); 443 }; 444 445 struct t10_reservation { 446 /* Reservation effects all target ports */ 447 int pr_all_tg_pt; 448 /* Activate Persistence across Target Power Loss enabled 449 * for SCSI device */ 450 int pr_aptpl_active; 451 /* Used by struct t10_reservation->pr_aptpl_buf_len */ 452 #define PR_APTPL_BUF_LEN 8192 453 u32 pr_aptpl_buf_len; 454 u32 pr_generation; 455 t10_reservations_index_t res_type; 456 spinlock_t registration_lock; 457 spinlock_t aptpl_reg_lock; 458 /* 459 * This will always be set by one individual I_T Nexus. 460 * However with all_tg_pt=1, other I_T Nexus from the 461 * same initiator can access PR reg/res info on a different 462 * target port. 463 * 464 * There is also the 'All Registrants' case, where there is 465 * a single *pr_res_holder of the reservation, but all 466 * registrations are considered reservation holders. 467 */ 468 struct se_node_acl *pr_res_holder; 469 struct list_head registration_list; 470 struct list_head aptpl_reg_list; 471 struct t10_reservation_ops pr_ops; 472 }; 473 474 struct se_queue_obj { 475 atomic_t queue_cnt; 476 spinlock_t cmd_queue_lock; 477 struct list_head qobj_list; 478 wait_queue_head_t thread_wq; 479 }; 480 481 struct se_tmr_req { 482 /* Task Management function to be performed */ 483 u8 function; 484 /* Task Management response to send */ 485 u8 response; 486 int call_transport; 487 /* Reference to ITT that Task Mgmt should be performed */ 488 u32 ref_task_tag; 489 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */ 490 u64 ref_task_lun; 491 void *fabric_tmr_ptr; 492 struct se_cmd *task_cmd; 493 struct se_cmd *ref_cmd; 494 struct se_device *tmr_dev; 495 struct se_lun *tmr_lun; 496 struct list_head tmr_list; 497 }; 498 499 struct se_cmd { 500 /* SAM response code being sent to initiator */ 501 u8 scsi_status; 502 u8 scsi_asc; 503 u8 scsi_ascq; 504 u8 scsi_sense_reason; 505 u16 scsi_sense_length; 506 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 507 int alua_nonop_delay; 508 /* See include/linux/dma-mapping.h */ 509 enum dma_data_direction data_direction; 510 /* For SAM Task Attribute */ 511 int sam_task_attr; 512 /* Transport protocol dependent state, see transport_state_table */ 513 enum transport_state_table t_state; 514 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */ 515 unsigned check_release:1; 516 unsigned cmd_wait_set:1; 517 unsigned unknown_data_length:1; 518 /* See se_cmd_flags_table */ 519 u32 se_cmd_flags; 520 u32 se_ordered_id; 521 /* Total size in bytes associated with command */ 522 u32 data_length; 523 /* SCSI Presented Data Transfer Length */ 524 u32 cmd_spdtl; 525 u32 residual_count; 526 u32 orig_fe_lun; 527 /* Persistent Reservation key */ 528 u64 pr_res_key; 529 /* Used for sense data */ 530 void *sense_buffer; 531 struct list_head se_delayed_node; 532 struct list_head se_lun_node; 533 struct list_head se_qf_node; 534 struct se_device *se_dev; 535 struct se_dev_entry *se_deve; 536 struct se_lun *se_lun; 537 /* Only used for internal passthrough and legacy TCM fabric modules */ 538 struct se_session *se_sess; 539 struct se_tmr_req *se_tmr_req; 540 struct list_head se_queue_node; 541 struct list_head se_cmd_list; 542 struct completion cmd_wait_comp; 543 struct kref cmd_kref; 544 struct target_core_fabric_ops *se_tfo; 545 int (*execute_cmd)(struct se_cmd *); 546 void (*transport_complete_callback)(struct se_cmd *); 547 548 unsigned char *t_task_cdb; 549 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 550 unsigned long long t_task_lba; 551 atomic_t t_fe_count; 552 unsigned int transport_state; 553 #define CMD_T_ABORTED (1 << 0) 554 #define CMD_T_ACTIVE (1 << 1) 555 #define CMD_T_COMPLETE (1 << 2) 556 #define CMD_T_QUEUED (1 << 3) 557 #define CMD_T_SENT (1 << 4) 558 #define CMD_T_STOP (1 << 5) 559 #define CMD_T_FAILED (1 << 6) 560 #define CMD_T_LUN_STOP (1 << 7) 561 #define CMD_T_LUN_FE_STOP (1 << 8) 562 #define CMD_T_DEV_ACTIVE (1 << 9) 563 #define CMD_T_REQUEST_STOP (1 << 10) 564 #define CMD_T_BUSY (1 << 11) 565 spinlock_t t_state_lock; 566 struct completion t_transport_stop_comp; 567 struct completion transport_lun_fe_stop_comp; 568 struct completion transport_lun_stop_comp; 569 570 struct work_struct work; 571 572 struct scatterlist *t_data_sg; 573 unsigned int t_data_nents; 574 void *t_data_vmap; 575 struct scatterlist *t_bidi_data_sg; 576 unsigned int t_bidi_data_nents; 577 578 struct list_head execute_list; 579 struct list_head state_list; 580 bool state_active; 581 582 /* old task stop completion, consider merging with some of the above */ 583 struct completion task_stop_comp; 584 585 /* backend private data */ 586 void *priv; 587 }; 588 589 struct se_ua { 590 u8 ua_asc; 591 u8 ua_ascq; 592 struct se_node_acl *ua_nacl; 593 struct list_head ua_dev_list; 594 struct list_head ua_nacl_list; 595 }; 596 597 struct se_node_acl { 598 char initiatorname[TRANSPORT_IQN_LEN]; 599 /* Used to signal demo mode created ACL, disabled by default */ 600 bool dynamic_node_acl; 601 bool acl_stop:1; 602 u32 queue_depth; 603 u32 acl_index; 604 u64 num_cmds; 605 u64 read_bytes; 606 u64 write_bytes; 607 spinlock_t stats_lock; 608 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 609 atomic_t acl_pr_ref_count; 610 struct se_dev_entry **device_list; 611 struct se_session *nacl_sess; 612 struct se_portal_group *se_tpg; 613 spinlock_t device_list_lock; 614 spinlock_t nacl_sess_lock; 615 struct config_group acl_group; 616 struct config_group acl_attrib_group; 617 struct config_group acl_auth_group; 618 struct config_group acl_param_group; 619 struct config_group acl_fabric_stat_group; 620 struct config_group *acl_default_groups[5]; 621 struct list_head acl_list; 622 struct list_head acl_sess_list; 623 struct completion acl_free_comp; 624 struct kref acl_kref; 625 }; 626 627 struct se_session { 628 unsigned sess_tearing_down:1; 629 u64 sess_bin_isid; 630 struct se_node_acl *se_node_acl; 631 struct se_portal_group *se_tpg; 632 void *fabric_sess_ptr; 633 struct list_head sess_list; 634 struct list_head sess_acl_list; 635 struct list_head sess_cmd_list; 636 struct list_head sess_wait_list; 637 spinlock_t sess_cmd_lock; 638 struct kref sess_kref; 639 }; 640 641 struct se_device; 642 struct se_transform_info; 643 struct scatterlist; 644 645 struct se_ml_stat_grps { 646 struct config_group stat_group; 647 struct config_group scsi_auth_intr_group; 648 struct config_group scsi_att_intr_port_group; 649 }; 650 651 struct se_lun_acl { 652 char initiatorname[TRANSPORT_IQN_LEN]; 653 u32 mapped_lun; 654 struct se_node_acl *se_lun_nacl; 655 struct se_lun *se_lun; 656 struct list_head lacl_list; 657 struct config_group se_lun_group; 658 struct se_ml_stat_grps ml_stat_grps; 659 }; 660 661 struct se_dev_entry { 662 bool def_pr_registered; 663 /* See transport_lunflags_table */ 664 u32 lun_flags; 665 u32 deve_cmds; 666 u32 mapped_lun; 667 u32 average_bytes; 668 u32 last_byte_count; 669 u32 total_cmds; 670 u32 total_bytes; 671 u64 pr_res_key; 672 u64 creation_time; 673 u32 attach_count; 674 u64 read_bytes; 675 u64 write_bytes; 676 atomic_t ua_count; 677 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 678 atomic_t pr_ref_count; 679 struct se_lun_acl *se_lun_acl; 680 spinlock_t ua_lock; 681 struct se_lun *se_lun; 682 struct list_head alua_port_list; 683 struct list_head ua_list; 684 }; 685 686 struct se_dev_limits { 687 /* Max supported HW queue depth */ 688 u32 hw_queue_depth; 689 /* Max supported virtual queue depth */ 690 u32 queue_depth; 691 /* From include/linux/blkdev.h for the other HW/SW limits. */ 692 struct queue_limits limits; 693 }; 694 695 struct se_dev_attrib { 696 int emulate_dpo; 697 int emulate_fua_write; 698 int emulate_fua_read; 699 int emulate_write_cache; 700 int emulate_ua_intlck_ctrl; 701 int emulate_tas; 702 int emulate_tpu; 703 int emulate_tpws; 704 int emulate_reservations; 705 int emulate_alua; 706 int enforce_pr_isids; 707 int is_nonrot; 708 int emulate_rest_reord; 709 u32 hw_block_size; 710 u32 block_size; 711 u32 hw_max_sectors; 712 u32 fabric_max_sectors; 713 u32 optimal_sectors; 714 u32 hw_queue_depth; 715 u32 queue_depth; 716 u32 max_unmap_lba_count; 717 u32 max_unmap_block_desc_count; 718 u32 unmap_granularity; 719 u32 unmap_granularity_alignment; 720 struct se_subsystem_dev *da_sub_dev; 721 struct config_group da_group; 722 }; 723 724 struct se_dev_stat_grps { 725 struct config_group stat_group; 726 struct config_group scsi_dev_group; 727 struct config_group scsi_tgt_dev_group; 728 struct config_group scsi_lu_group; 729 }; 730 731 struct se_subsystem_dev { 732 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */ 733 #define SE_DEV_ALIAS_LEN 512 734 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN]; 735 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */ 736 #define SE_UDEV_PATH_LEN 512 737 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN]; 738 u32 su_dev_flags; 739 struct se_hba *se_dev_hba; 740 struct se_device *se_dev_ptr; 741 struct se_dev_attrib se_dev_attrib; 742 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 743 struct t10_alua t10_alua; 744 /* T10 Inquiry and VPD WWN Information */ 745 struct t10_wwn t10_wwn; 746 /* T10 SPC-2 + SPC-3 Reservations */ 747 struct t10_reservation t10_pr; 748 spinlock_t se_dev_lock; 749 void *se_dev_su_ptr; 750 struct config_group se_dev_group; 751 /* For T10 Reservations */ 752 struct config_group se_dev_pr_group; 753 /* For target_core_stat.c groups */ 754 struct se_dev_stat_grps dev_stat_grps; 755 }; 756 757 struct se_device { 758 /* RELATIVE TARGET PORT IDENTIFER Counter */ 759 u16 dev_rpti_counter; 760 /* Used for SAM Task Attribute ordering */ 761 u32 dev_cur_ordered_id; 762 u32 dev_flags; 763 u32 dev_port_count; 764 /* See transport_device_status_table */ 765 u32 dev_status; 766 /* Physical device queue depth */ 767 u32 queue_depth; 768 /* Used for SPC-2 reservations enforce of ISIDs */ 769 u64 dev_res_bin_isid; 770 t10_task_attr_index_t dev_task_attr_type; 771 /* Pointer to transport specific device structure */ 772 void *dev_ptr; 773 u32 dev_index; 774 u64 creation_time; 775 u32 num_resets; 776 u64 num_cmds; 777 u64 read_bytes; 778 u64 write_bytes; 779 spinlock_t stats_lock; 780 /* Active commands on this virtual SE device */ 781 atomic_t simple_cmds; 782 atomic_t dev_ordered_id; 783 atomic_t execute_tasks; 784 atomic_t dev_ordered_sync; 785 atomic_t dev_qf_count; 786 struct se_obj dev_obj; 787 struct se_obj dev_access_obj; 788 struct se_obj dev_export_obj; 789 struct se_queue_obj dev_queue_obj; 790 spinlock_t delayed_cmd_lock; 791 spinlock_t execute_task_lock; 792 spinlock_t dev_reservation_lock; 793 spinlock_t dev_status_lock; 794 spinlock_t se_port_lock; 795 spinlock_t se_tmr_lock; 796 spinlock_t qf_cmd_lock; 797 /* Used for legacy SPC-2 reservationsa */ 798 struct se_node_acl *dev_reserved_node_acl; 799 /* Used for ALUA Logical Unit Group membership */ 800 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 801 /* Used for SPC-3 Persistent Reservations */ 802 struct t10_pr_registration *dev_pr_res_holder; 803 struct list_head dev_sep_list; 804 struct list_head dev_tmr_list; 805 /* Pointer to descriptor for processing thread */ 806 struct task_struct *process_thread; 807 struct work_struct qf_work_queue; 808 struct list_head delayed_cmd_list; 809 struct list_head execute_list; 810 struct list_head state_list; 811 struct list_head qf_cmd_list; 812 /* Pointer to associated SE HBA */ 813 struct se_hba *se_hba; 814 struct se_subsystem_dev *se_sub_dev; 815 /* Pointer to template of function pointers for transport */ 816 struct se_subsystem_api *transport; 817 /* Linked list for struct se_hba struct se_device list */ 818 struct list_head dev_list; 819 }; 820 821 struct se_hba { 822 u16 hba_tpgt; 823 u32 hba_id; 824 /* See hba_flags_table */ 825 u32 hba_flags; 826 /* Virtual iSCSI devices attached. */ 827 u32 dev_count; 828 u32 hba_index; 829 /* Pointer to transport specific host structure. */ 830 void *hba_ptr; 831 /* Linked list for struct se_device */ 832 struct list_head hba_dev_list; 833 struct list_head hba_node; 834 spinlock_t device_lock; 835 struct config_group hba_group; 836 struct mutex hba_access_mutex; 837 struct se_subsystem_api *transport; 838 }; 839 840 struct se_port_stat_grps { 841 struct config_group stat_group; 842 struct config_group scsi_port_group; 843 struct config_group scsi_tgt_port_group; 844 struct config_group scsi_transport_group; 845 }; 846 847 struct se_lun { 848 /* See transport_lun_status_table */ 849 enum transport_lun_status_table lun_status; 850 u32 lun_access; 851 u32 lun_flags; 852 u32 unpacked_lun; 853 atomic_t lun_acl_count; 854 spinlock_t lun_acl_lock; 855 spinlock_t lun_cmd_lock; 856 spinlock_t lun_sep_lock; 857 struct completion lun_shutdown_comp; 858 struct list_head lun_cmd_list; 859 struct list_head lun_acl_list; 860 struct se_device *lun_se_dev; 861 struct se_port *lun_sep; 862 struct config_group lun_group; 863 struct se_port_stat_grps port_stat_grps; 864 }; 865 866 struct scsi_port_stats { 867 u64 cmd_pdus; 868 u64 tx_data_octets; 869 u64 rx_data_octets; 870 }; 871 872 struct se_port { 873 /* RELATIVE TARGET PORT IDENTIFER */ 874 u16 sep_rtpi; 875 int sep_tg_pt_secondary_stat; 876 int sep_tg_pt_secondary_write_md; 877 u32 sep_index; 878 struct scsi_port_stats sep_stats; 879 /* Used for ALUA Target Port Groups membership */ 880 atomic_t sep_tg_pt_secondary_offline; 881 /* Used for PR ALL_TG_PT=1 */ 882 atomic_t sep_tg_pt_ref_cnt; 883 spinlock_t sep_alua_lock; 884 struct mutex sep_tg_pt_md_mutex; 885 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 886 struct se_lun *sep_lun; 887 struct se_portal_group *sep_tpg; 888 struct list_head sep_alua_list; 889 struct list_head sep_list; 890 }; 891 892 struct se_tpg_np { 893 struct se_portal_group *tpg_np_parent; 894 struct config_group tpg_np_group; 895 }; 896 897 struct se_portal_group { 898 /* Type of target portal group, see transport_tpg_type_table */ 899 enum transport_tpg_type_table se_tpg_type; 900 /* Number of ACLed Initiator Nodes for this TPG */ 901 u32 num_node_acls; 902 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 903 atomic_t tpg_pr_ref_count; 904 /* Spinlock for adding/removing ACLed Nodes */ 905 spinlock_t acl_node_lock; 906 /* Spinlock for adding/removing sessions */ 907 spinlock_t session_lock; 908 spinlock_t tpg_lun_lock; 909 /* Pointer to $FABRIC_MOD portal group */ 910 void *se_tpg_fabric_ptr; 911 struct list_head se_tpg_node; 912 /* linked list for initiator ACL list */ 913 struct list_head acl_node_list; 914 struct se_lun **tpg_lun_list; 915 struct se_lun tpg_virt_lun0; 916 /* List of TCM sessions associated wth this TPG */ 917 struct list_head tpg_sess_list; 918 /* Pointer to $FABRIC_MOD dependent code */ 919 struct target_core_fabric_ops *se_tpg_tfo; 920 struct se_wwn *se_tpg_wwn; 921 struct config_group tpg_group; 922 struct config_group *tpg_default_groups[6]; 923 struct config_group tpg_lun_group; 924 struct config_group tpg_np_group; 925 struct config_group tpg_acl_group; 926 struct config_group tpg_attrib_group; 927 struct config_group tpg_param_group; 928 }; 929 930 struct se_wwn { 931 struct target_fabric_configfs *wwn_tf; 932 struct config_group wwn_group; 933 struct config_group *wwn_default_groups[2]; 934 struct config_group fabric_stat_group; 935 }; 936 937 #endif /* TARGET_CORE_BASE_H */ 938