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-rc1-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_READ_ONLY 0x00000001 77 #define DF_SPC2_RESERVATIONS 0x00000002 78 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004 79 80 /* struct se_dev_attrib sanity values */ 81 /* Default max_unmap_lba_count */ 82 #define DA_MAX_UNMAP_LBA_COUNT 0 83 /* Default max_unmap_block_desc_count */ 84 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 85 /* Default unmap_granularity */ 86 #define DA_UNMAP_GRANULARITY_DEFAULT 0 87 /* Default unmap_granularity_alignment */ 88 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 89 /* Emulation for Direct Page Out */ 90 #define DA_EMULATE_DPO 0 91 /* Emulation for Forced Unit Access WRITEs */ 92 #define DA_EMULATE_FUA_WRITE 1 93 /* Emulation for Forced Unit Access READs */ 94 #define DA_EMULATE_FUA_READ 0 95 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 96 #define DA_EMULATE_WRITE_CACHE 0 97 /* Emulation for UNIT ATTENTION Interlock Control */ 98 #define DA_EMULATE_UA_INTLLCK_CTRL 0 99 /* Emulation for TASK_ABORTED status (TAS) by default */ 100 #define DA_EMULATE_TAS 1 101 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 102 #define DA_EMULATE_TPU 0 103 /* 104 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 105 * block/blk-lib.c:blkdev_issue_discard() 106 */ 107 #define DA_EMULATE_TPWS 0 108 /* No Emulation for PSCSI by default */ 109 #define DA_EMULATE_RESERVATIONS 0 110 /* No Emulation for PSCSI by default */ 111 #define DA_EMULATE_ALUA 0 112 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 113 #define DA_ENFORCE_PR_ISIDS 1 114 #define DA_STATUS_MAX_SECTORS_MIN 16 115 #define DA_STATUS_MAX_SECTORS_MAX 8192 116 /* By default don't report non-rotating (solid state) medium */ 117 #define DA_IS_NONROT 0 118 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 119 #define DA_EMULATE_REST_REORD 0 120 121 #define SE_MODE_PAGE_BUF 512 122 123 124 /* 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 /* struct se_task->task_flags */ 143 enum se_task_flags { 144 TF_ACTIVE = (1 << 0), 145 TF_SENT = (1 << 1), 146 TF_REQUEST_STOP = (1 << 2), 147 TF_HAS_SENSE = (1 << 3), 148 }; 149 150 /* Special transport agnostic struct se_cmd->t_states */ 151 enum transport_state_table { 152 TRANSPORT_NO_STATE = 0, 153 TRANSPORT_NEW_CMD = 1, 154 TRANSPORT_WRITE_PENDING = 3, 155 TRANSPORT_PROCESS_WRITE = 4, 156 TRANSPORT_PROCESSING = 5, 157 TRANSPORT_COMPLETE = 6, 158 TRANSPORT_PROCESS_TMR = 9, 159 TRANSPORT_ISTATE_PROCESSING = 11, 160 TRANSPORT_NEW_CMD_MAP = 16, 161 TRANSPORT_COMPLETE_QF_WP = 18, 162 TRANSPORT_COMPLETE_QF_OK = 19, 163 }; 164 165 /* Used for struct se_cmd->se_cmd_flags */ 166 enum se_cmd_flags_table { 167 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 168 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 169 SCF_EMULATED_TASK_SENSE = 0x00000004, 170 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008, 171 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010, 172 SCF_SCSI_NON_DATA_CDB = 0x00000040, 173 SCF_SCSI_CDB_EXCEPTION = 0x00000080, 174 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100, 175 SCF_FUA = 0x00000200, 176 SCF_SE_LUN_CMD = 0x00000800, 177 SCF_SE_ALLOW_EOO = 0x00001000, 178 SCF_BIDI = 0x00002000, 179 SCF_SENT_CHECK_CONDITION = 0x00004000, 180 SCF_OVERFLOW_BIT = 0x00008000, 181 SCF_UNDERFLOW_BIT = 0x00010000, 182 SCF_SENT_DELAYED_TAS = 0x00020000, 183 SCF_ALUA_NON_OPTIMIZED = 0x00040000, 184 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000, 185 SCF_UNUSED = 0x00100000, 186 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000, 187 }; 188 189 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */ 190 enum transport_lunflags_table { 191 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00, 192 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01, 193 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02, 194 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04, 195 }; 196 197 /* struct se_device->dev_status */ 198 enum transport_device_status_table { 199 TRANSPORT_DEVICE_ACTIVATED = 0x01, 200 TRANSPORT_DEVICE_DEACTIVATED = 0x02, 201 TRANSPORT_DEVICE_QUEUE_FULL = 0x04, 202 TRANSPORT_DEVICE_SHUTDOWN = 0x08, 203 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10, 204 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20, 205 }; 206 207 /* 208 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason 209 * to signal which ASC/ASCQ sense payload should be built. 210 */ 211 enum tcm_sense_reason_table { 212 TCM_NON_EXISTENT_LUN = 0x01, 213 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02, 214 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03, 215 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04, 216 TCM_SERVICE_CRC_ERROR = 0x05, 217 TCM_SNACK_REJECTED = 0x06, 218 TCM_SECTOR_COUNT_TOO_MANY = 0x07, 219 TCM_INVALID_CDB_FIELD = 0x08, 220 TCM_INVALID_PARAMETER_LIST = 0x09, 221 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a, 222 TCM_UNKNOWN_MODE_PAGE = 0x0b, 223 TCM_WRITE_PROTECTED = 0x0c, 224 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d, 225 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e, 226 TCM_CHECK_CONDITION_NOT_READY = 0x0f, 227 TCM_RESERVATION_CONFLICT = 0x10, 228 }; 229 230 enum target_sc_flags_table { 231 TARGET_SCF_BIDI_OP = 0x01, 232 TARGET_SCF_ACK_KREF = 0x02, 233 }; 234 235 /* fabric independent task management function values */ 236 enum tcm_tmreq_table { 237 TMR_ABORT_TASK = 1, 238 TMR_ABORT_TASK_SET = 2, 239 TMR_CLEAR_ACA = 3, 240 TMR_CLEAR_TASK_SET = 4, 241 TMR_LUN_RESET = 5, 242 TMR_TARGET_WARM_RESET = 6, 243 TMR_TARGET_COLD_RESET = 7, 244 TMR_FABRIC_TMR = 255, 245 }; 246 247 /* fabric independent task management response values */ 248 enum tcm_tmrsp_table { 249 TMR_FUNCTION_COMPLETE = 0, 250 TMR_TASK_DOES_NOT_EXIST = 1, 251 TMR_LUN_DOES_NOT_EXIST = 2, 252 TMR_TASK_STILL_ALLEGIANT = 3, 253 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4, 254 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5, 255 TMR_FUNCTION_AUTHORIZATION_FAILED = 6, 256 TMR_FUNCTION_REJECTED = 255, 257 }; 258 259 struct se_obj { 260 atomic_t obj_access_count; 261 }; 262 263 /* 264 * Used by TCM Core internally to signal if ALUA emulation is enabled or 265 * disabled, or running in with TCM/pSCSI passthrough mode 266 */ 267 typedef enum { 268 SPC_ALUA_PASSTHROUGH, 269 SPC2_ALUA_DISABLED, 270 SPC3_ALUA_EMULATED 271 } t10_alua_index_t; 272 273 /* 274 * Used by TCM Core internally to signal if SAM Task Attribute emulation 275 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode 276 */ 277 typedef enum { 278 SAM_TASK_ATTR_PASSTHROUGH, 279 SAM_TASK_ATTR_UNTAGGED, 280 SAM_TASK_ATTR_EMULATED 281 } t10_task_attr_index_t; 282 283 /* 284 * Used for target SCSI statistics 285 */ 286 typedef enum { 287 SCSI_INST_INDEX, 288 SCSI_DEVICE_INDEX, 289 SCSI_AUTH_INTR_INDEX, 290 SCSI_INDEX_TYPE_MAX 291 } scsi_index_t; 292 293 struct se_cmd; 294 295 struct t10_alua { 296 t10_alua_index_t alua_type; 297 /* ALUA Target Port Group ID */ 298 u16 alua_tg_pt_gps_counter; 299 u32 alua_tg_pt_gps_count; 300 spinlock_t tg_pt_gps_lock; 301 struct se_subsystem_dev *t10_sub_dev; 302 /* Used for default ALUA Target Port Group */ 303 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 304 /* Used for default ALUA Target Port Group ConfigFS group */ 305 struct config_group alua_tg_pt_gps_group; 306 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *); 307 struct list_head tg_pt_gps_list; 308 }; 309 310 struct t10_alua_lu_gp { 311 u16 lu_gp_id; 312 int lu_gp_valid_id; 313 u32 lu_gp_members; 314 atomic_t lu_gp_ref_cnt; 315 spinlock_t lu_gp_lock; 316 struct config_group lu_gp_group; 317 struct list_head lu_gp_node; 318 struct list_head lu_gp_mem_list; 319 }; 320 321 struct t10_alua_lu_gp_member { 322 bool lu_gp_assoc; 323 atomic_t lu_gp_mem_ref_cnt; 324 spinlock_t lu_gp_mem_lock; 325 struct t10_alua_lu_gp *lu_gp; 326 struct se_device *lu_gp_mem_dev; 327 struct list_head lu_gp_mem_list; 328 }; 329 330 struct t10_alua_tg_pt_gp { 331 u16 tg_pt_gp_id; 332 int tg_pt_gp_valid_id; 333 int tg_pt_gp_alua_access_status; 334 int tg_pt_gp_alua_access_type; 335 int tg_pt_gp_nonop_delay_msecs; 336 int tg_pt_gp_trans_delay_msecs; 337 int tg_pt_gp_pref; 338 int tg_pt_gp_write_metadata; 339 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */ 340 #define ALUA_MD_BUF_LEN 1024 341 u32 tg_pt_gp_md_buf_len; 342 u32 tg_pt_gp_members; 343 atomic_t tg_pt_gp_alua_access_state; 344 atomic_t tg_pt_gp_ref_cnt; 345 spinlock_t tg_pt_gp_lock; 346 struct mutex tg_pt_gp_md_mutex; 347 struct se_subsystem_dev *tg_pt_gp_su_dev; 348 struct config_group tg_pt_gp_group; 349 struct list_head tg_pt_gp_list; 350 struct list_head tg_pt_gp_mem_list; 351 }; 352 353 struct t10_alua_tg_pt_gp_member { 354 bool tg_pt_gp_assoc; 355 atomic_t tg_pt_gp_mem_ref_cnt; 356 spinlock_t tg_pt_gp_mem_lock; 357 struct t10_alua_tg_pt_gp *tg_pt_gp; 358 struct se_port *tg_pt; 359 struct list_head tg_pt_gp_mem_list; 360 }; 361 362 struct t10_vpd { 363 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 364 int protocol_identifier_set; 365 u32 protocol_identifier; 366 u32 device_identifier_code_set; 367 u32 association; 368 u32 device_identifier_type; 369 struct list_head vpd_list; 370 }; 371 372 struct t10_wwn { 373 char vendor[8]; 374 char model[16]; 375 char revision[4]; 376 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 377 spinlock_t t10_vpd_lock; 378 struct se_subsystem_dev *t10_sub_dev; 379 struct config_group t10_wwn_group; 380 struct list_head t10_vpd_list; 381 }; 382 383 384 /* 385 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations 386 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough 387 * mode 388 */ 389 typedef enum { 390 SPC_PASSTHROUGH, 391 SPC2_RESERVATIONS, 392 SPC3_PERSISTENT_RESERVATIONS 393 } t10_reservations_index_t; 394 395 struct t10_pr_registration { 396 /* Used for fabrics that contain WWN+ISID */ 397 #define PR_REG_ISID_LEN 16 398 /* PR_REG_ISID_LEN + ',i,0x' */ 399 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 400 char pr_reg_isid[PR_REG_ISID_LEN]; 401 /* Used during APTPL metadata reading */ 402 #define PR_APTPL_MAX_IPORT_LEN 256 403 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 404 /* Used during APTPL metadata reading */ 405 #define PR_APTPL_MAX_TPORT_LEN 256 406 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 407 /* For writing out live meta data */ 408 unsigned char *pr_aptpl_buf; 409 u16 pr_aptpl_rpti; 410 u16 pr_reg_tpgt; 411 /* Reservation effects all target ports */ 412 int pr_reg_all_tg_pt; 413 /* Activate Persistence across Target Power Loss */ 414 int pr_reg_aptpl; 415 int pr_res_holder; 416 int pr_res_type; 417 int pr_res_scope; 418 /* Used for fabric initiator WWPNs using a ISID */ 419 bool isid_present_at_reg; 420 u32 pr_res_mapped_lun; 421 u32 pr_aptpl_target_lun; 422 u32 pr_res_generation; 423 u64 pr_reg_bin_isid; 424 u64 pr_res_key; 425 atomic_t pr_res_holders; 426 struct se_node_acl *pr_reg_nacl; 427 struct se_dev_entry *pr_reg_deve; 428 struct se_lun *pr_reg_tg_pt_lun; 429 struct list_head pr_reg_list; 430 struct list_head pr_reg_abort_list; 431 struct list_head pr_reg_aptpl_list; 432 struct list_head pr_reg_atp_list; 433 struct list_head pr_reg_atp_mem_list; 434 }; 435 436 /* 437 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, 438 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: 439 * core_setup_reservations() 440 */ 441 struct t10_reservation_ops { 442 int (*t10_reservation_check)(struct se_cmd *, u32 *); 443 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32); 444 int (*t10_pr_register)(struct se_cmd *); 445 int (*t10_pr_clear)(struct se_cmd *); 446 }; 447 448 struct t10_reservation { 449 /* Reservation effects all target ports */ 450 int pr_all_tg_pt; 451 /* Activate Persistence across Target Power Loss enabled 452 * for SCSI device */ 453 int pr_aptpl_active; 454 /* Used by struct t10_reservation->pr_aptpl_buf_len */ 455 #define PR_APTPL_BUF_LEN 8192 456 u32 pr_aptpl_buf_len; 457 u32 pr_generation; 458 t10_reservations_index_t res_type; 459 spinlock_t registration_lock; 460 spinlock_t aptpl_reg_lock; 461 /* 462 * This will always be set by one individual I_T Nexus. 463 * However with all_tg_pt=1, other I_T Nexus from the 464 * same initiator can access PR reg/res info on a different 465 * target port. 466 * 467 * There is also the 'All Registrants' case, where there is 468 * a single *pr_res_holder of the reservation, but all 469 * registrations are considered reservation holders. 470 */ 471 struct se_node_acl *pr_res_holder; 472 struct list_head registration_list; 473 struct list_head aptpl_reg_list; 474 struct t10_reservation_ops pr_ops; 475 }; 476 477 struct se_queue_req { 478 int state; 479 struct se_cmd *cmd; 480 struct list_head qr_list; 481 }; 482 483 struct se_queue_obj { 484 atomic_t queue_cnt; 485 spinlock_t cmd_queue_lock; 486 struct list_head qobj_list; 487 wait_queue_head_t thread_wq; 488 }; 489 490 struct se_task { 491 unsigned long long task_lba; 492 u32 task_sectors; 493 u32 task_size; 494 struct se_cmd *task_se_cmd; 495 struct scatterlist *task_sg; 496 u32 task_sg_nents; 497 u16 task_flags; 498 u8 task_scsi_status; 499 enum dma_data_direction task_data_direction; 500 struct list_head t_list; 501 struct list_head t_execute_list; 502 struct list_head t_state_list; 503 bool t_state_active; 504 struct completion task_stop_comp; 505 }; 506 507 struct se_cmd { 508 /* SAM response code being sent to initiator */ 509 u8 scsi_status; 510 u8 scsi_asc; 511 u8 scsi_ascq; 512 u8 scsi_sense_reason; 513 u16 scsi_sense_length; 514 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 515 int alua_nonop_delay; 516 /* See include/linux/dma-mapping.h */ 517 enum dma_data_direction data_direction; 518 /* For SAM Task Attribute */ 519 int sam_task_attr; 520 /* Transport protocol dependent state, see transport_state_table */ 521 enum transport_state_table t_state; 522 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */ 523 unsigned check_release:1; 524 unsigned cmd_wait_set:1; 525 /* See se_cmd_flags_table */ 526 u32 se_cmd_flags; 527 u32 se_ordered_id; 528 /* Total size in bytes associated with command */ 529 u32 data_length; 530 /* SCSI Presented Data Transfer Length */ 531 u32 cmd_spdtl; 532 u32 residual_count; 533 u32 orig_fe_lun; 534 /* Persistent Reservation key */ 535 u64 pr_res_key; 536 /* Used for sense data */ 537 void *sense_buffer; 538 struct list_head se_delayed_node; 539 struct list_head se_lun_node; 540 struct list_head se_qf_node; 541 struct se_device *se_dev; 542 struct se_dev_entry *se_deve; 543 struct se_lun *se_lun; 544 /* Only used for internal passthrough and legacy TCM fabric modules */ 545 struct se_session *se_sess; 546 struct se_tmr_req *se_tmr_req; 547 struct list_head se_queue_node; 548 struct list_head se_cmd_list; 549 struct completion cmd_wait_comp; 550 struct kref cmd_kref; 551 struct target_core_fabric_ops *se_tfo; 552 int (*execute_task)(struct se_task *); 553 void (*transport_complete_callback)(struct se_cmd *); 554 555 unsigned char *t_task_cdb; 556 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 557 unsigned long long t_task_lba; 558 int t_tasks_failed; 559 u32 t_tasks_sg_chained_no; 560 atomic_t t_fe_count; 561 atomic_t t_se_count; 562 atomic_t t_task_cdbs_left; 563 atomic_t t_task_cdbs_ex_left; 564 atomic_t t_task_cdbs_sent; 565 atomic_t t_transport_aborted; 566 atomic_t t_transport_active; 567 atomic_t t_transport_complete; 568 atomic_t t_transport_queue_active; 569 atomic_t t_transport_sent; 570 atomic_t t_transport_stop; 571 atomic_t transport_dev_active; 572 atomic_t transport_lun_active; 573 atomic_t transport_lun_fe_stop; 574 atomic_t transport_lun_stop; 575 spinlock_t t_state_lock; 576 struct completion t_transport_stop_comp; 577 struct completion transport_lun_fe_stop_comp; 578 struct completion transport_lun_stop_comp; 579 struct scatterlist *t_tasks_sg_chained; 580 581 struct work_struct work; 582 583 struct scatterlist *t_data_sg; 584 unsigned int t_data_nents; 585 struct scatterlist *t_bidi_data_sg; 586 unsigned int t_bidi_data_nents; 587 588 /* Used for BIDI READ */ 589 struct list_head t_task_list; 590 u32 t_task_list_num; 591 592 }; 593 594 struct se_tmr_req { 595 /* Task Management function to be preformed */ 596 u8 function; 597 /* Task Management response to send */ 598 u8 response; 599 int call_transport; 600 /* Reference to ITT that Task Mgmt should be preformed */ 601 u32 ref_task_tag; 602 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */ 603 u64 ref_task_lun; 604 void *fabric_tmr_ptr; 605 struct se_cmd *task_cmd; 606 struct se_cmd *ref_cmd; 607 struct se_device *tmr_dev; 608 struct se_lun *tmr_lun; 609 struct list_head tmr_list; 610 }; 611 612 struct se_ua { 613 u8 ua_asc; 614 u8 ua_ascq; 615 struct se_node_acl *ua_nacl; 616 struct list_head ua_dev_list; 617 struct list_head ua_nacl_list; 618 }; 619 620 struct se_node_acl { 621 char initiatorname[TRANSPORT_IQN_LEN]; 622 /* Used to signal demo mode created ACL, disabled by default */ 623 bool dynamic_node_acl; 624 u32 queue_depth; 625 u32 acl_index; 626 u64 num_cmds; 627 u64 read_bytes; 628 u64 write_bytes; 629 spinlock_t stats_lock; 630 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 631 atomic_t acl_pr_ref_count; 632 struct se_dev_entry *device_list; 633 struct se_session *nacl_sess; 634 struct se_portal_group *se_tpg; 635 spinlock_t device_list_lock; 636 spinlock_t nacl_sess_lock; 637 struct config_group acl_group; 638 struct config_group acl_attrib_group; 639 struct config_group acl_auth_group; 640 struct config_group acl_param_group; 641 struct config_group acl_fabric_stat_group; 642 struct config_group *acl_default_groups[5]; 643 struct list_head acl_list; 644 struct list_head acl_sess_list; 645 }; 646 647 struct se_session { 648 unsigned sess_tearing_down:1; 649 u64 sess_bin_isid; 650 struct se_node_acl *se_node_acl; 651 struct se_portal_group *se_tpg; 652 void *fabric_sess_ptr; 653 struct list_head sess_list; 654 struct list_head sess_acl_list; 655 struct list_head sess_cmd_list; 656 struct list_head sess_wait_list; 657 spinlock_t sess_cmd_lock; 658 }; 659 660 struct se_device; 661 struct se_transform_info; 662 struct scatterlist; 663 664 struct se_ml_stat_grps { 665 struct config_group stat_group; 666 struct config_group scsi_auth_intr_group; 667 struct config_group scsi_att_intr_port_group; 668 }; 669 670 struct se_lun_acl { 671 char initiatorname[TRANSPORT_IQN_LEN]; 672 u32 mapped_lun; 673 struct se_node_acl *se_lun_nacl; 674 struct se_lun *se_lun; 675 struct list_head lacl_list; 676 struct config_group se_lun_group; 677 struct se_ml_stat_grps ml_stat_grps; 678 }; 679 680 struct se_dev_entry { 681 bool def_pr_registered; 682 /* See transport_lunflags_table */ 683 u32 lun_flags; 684 u32 deve_cmds; 685 u32 mapped_lun; 686 u32 average_bytes; 687 u32 last_byte_count; 688 u32 total_cmds; 689 u32 total_bytes; 690 u64 pr_res_key; 691 u64 creation_time; 692 u32 attach_count; 693 u64 read_bytes; 694 u64 write_bytes; 695 atomic_t ua_count; 696 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 697 atomic_t pr_ref_count; 698 struct se_lun_acl *se_lun_acl; 699 spinlock_t ua_lock; 700 struct se_lun *se_lun; 701 struct list_head alua_port_list; 702 struct list_head ua_list; 703 }; 704 705 struct se_dev_limits { 706 /* Max supported HW queue depth */ 707 u32 hw_queue_depth; 708 /* Max supported virtual queue depth */ 709 u32 queue_depth; 710 /* From include/linux/blkdev.h for the other HW/SW limits. */ 711 struct queue_limits limits; 712 }; 713 714 struct se_dev_attrib { 715 int emulate_dpo; 716 int emulate_fua_write; 717 int emulate_fua_read; 718 int emulate_write_cache; 719 int emulate_ua_intlck_ctrl; 720 int emulate_tas; 721 int emulate_tpu; 722 int emulate_tpws; 723 int emulate_reservations; 724 int emulate_alua; 725 int enforce_pr_isids; 726 int is_nonrot; 727 int emulate_rest_reord; 728 u32 hw_block_size; 729 u32 block_size; 730 u32 hw_max_sectors; 731 u32 max_sectors; 732 u32 optimal_sectors; 733 u32 hw_queue_depth; 734 u32 queue_depth; 735 u32 max_unmap_lba_count; 736 u32 max_unmap_block_desc_count; 737 u32 unmap_granularity; 738 u32 unmap_granularity_alignment; 739 struct se_subsystem_dev *da_sub_dev; 740 struct config_group da_group; 741 }; 742 743 struct se_dev_stat_grps { 744 struct config_group stat_group; 745 struct config_group scsi_dev_group; 746 struct config_group scsi_tgt_dev_group; 747 struct config_group scsi_lu_group; 748 }; 749 750 struct se_subsystem_dev { 751 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */ 752 #define SE_DEV_ALIAS_LEN 512 753 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN]; 754 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */ 755 #define SE_UDEV_PATH_LEN 512 756 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN]; 757 u32 su_dev_flags; 758 struct se_hba *se_dev_hba; 759 struct se_device *se_dev_ptr; 760 struct se_dev_attrib se_dev_attrib; 761 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 762 struct t10_alua t10_alua; 763 /* T10 Inquiry and VPD WWN Information */ 764 struct t10_wwn t10_wwn; 765 /* T10 SPC-2 + SPC-3 Reservations */ 766 struct t10_reservation t10_pr; 767 spinlock_t se_dev_lock; 768 void *se_dev_su_ptr; 769 struct config_group se_dev_group; 770 /* For T10 Reservations */ 771 struct config_group se_dev_pr_group; 772 /* For target_core_stat.c groups */ 773 struct se_dev_stat_grps dev_stat_grps; 774 }; 775 776 struct se_device { 777 /* RELATIVE TARGET PORT IDENTIFER Counter */ 778 u16 dev_rpti_counter; 779 /* Used for SAM Task Attribute ordering */ 780 u32 dev_cur_ordered_id; 781 u32 dev_flags; 782 u32 dev_port_count; 783 /* See transport_device_status_table */ 784 u32 dev_status; 785 /* Physical device queue depth */ 786 u32 queue_depth; 787 /* Used for SPC-2 reservations enforce of ISIDs */ 788 u64 dev_res_bin_isid; 789 t10_task_attr_index_t dev_task_attr_type; 790 /* Pointer to transport specific device structure */ 791 void *dev_ptr; 792 u32 dev_index; 793 u64 creation_time; 794 u32 num_resets; 795 u64 num_cmds; 796 u64 read_bytes; 797 u64 write_bytes; 798 spinlock_t stats_lock; 799 /* Active commands on this virtual SE device */ 800 atomic_t simple_cmds; 801 atomic_t dev_ordered_id; 802 atomic_t execute_tasks; 803 atomic_t dev_ordered_sync; 804 atomic_t dev_qf_count; 805 struct se_obj dev_obj; 806 struct se_obj dev_access_obj; 807 struct se_obj dev_export_obj; 808 struct se_queue_obj dev_queue_obj; 809 spinlock_t delayed_cmd_lock; 810 spinlock_t execute_task_lock; 811 spinlock_t dev_reservation_lock; 812 spinlock_t dev_status_lock; 813 spinlock_t se_port_lock; 814 spinlock_t se_tmr_lock; 815 spinlock_t qf_cmd_lock; 816 /* Used for legacy SPC-2 reservationsa */ 817 struct se_node_acl *dev_reserved_node_acl; 818 /* Used for ALUA Logical Unit Group membership */ 819 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 820 /* Used for SPC-3 Persistent Reservations */ 821 struct t10_pr_registration *dev_pr_res_holder; 822 struct list_head dev_sep_list; 823 struct list_head dev_tmr_list; 824 /* Pointer to descriptor for processing thread */ 825 struct task_struct *process_thread; 826 struct work_struct qf_work_queue; 827 struct list_head delayed_cmd_list; 828 struct list_head execute_task_list; 829 struct list_head state_task_list; 830 struct list_head qf_cmd_list; 831 /* Pointer to associated SE HBA */ 832 struct se_hba *se_hba; 833 struct se_subsystem_dev *se_sub_dev; 834 /* Pointer to template of function pointers for transport */ 835 struct se_subsystem_api *transport; 836 /* Linked list for struct se_hba struct se_device list */ 837 struct list_head dev_list; 838 }; 839 840 struct se_hba { 841 u16 hba_tpgt; 842 u32 hba_id; 843 /* See hba_flags_table */ 844 u32 hba_flags; 845 /* Virtual iSCSI devices attached. */ 846 u32 dev_count; 847 u32 hba_index; 848 /* Pointer to transport specific host structure. */ 849 void *hba_ptr; 850 /* Linked list for struct se_device */ 851 struct list_head hba_dev_list; 852 struct list_head hba_node; 853 spinlock_t device_lock; 854 struct config_group hba_group; 855 struct mutex hba_access_mutex; 856 struct se_subsystem_api *transport; 857 }; 858 859 struct se_port_stat_grps { 860 struct config_group stat_group; 861 struct config_group scsi_port_group; 862 struct config_group scsi_tgt_port_group; 863 struct config_group scsi_transport_group; 864 }; 865 866 struct se_lun { 867 /* See transport_lun_status_table */ 868 enum transport_lun_status_table lun_status; 869 u32 lun_access; 870 u32 lun_flags; 871 u32 unpacked_lun; 872 atomic_t lun_acl_count; 873 spinlock_t lun_acl_lock; 874 spinlock_t lun_cmd_lock; 875 spinlock_t lun_sep_lock; 876 struct completion lun_shutdown_comp; 877 struct list_head lun_cmd_list; 878 struct list_head lun_acl_list; 879 struct se_device *lun_se_dev; 880 struct se_port *lun_sep; 881 struct config_group lun_group; 882 struct se_port_stat_grps port_stat_grps; 883 }; 884 885 struct scsi_port_stats { 886 u64 cmd_pdus; 887 u64 tx_data_octets; 888 u64 rx_data_octets; 889 }; 890 891 struct se_port { 892 /* RELATIVE TARGET PORT IDENTIFER */ 893 u16 sep_rtpi; 894 int sep_tg_pt_secondary_stat; 895 int sep_tg_pt_secondary_write_md; 896 u32 sep_index; 897 struct scsi_port_stats sep_stats; 898 /* Used for ALUA Target Port Groups membership */ 899 atomic_t sep_tg_pt_secondary_offline; 900 /* Used for PR ALL_TG_PT=1 */ 901 atomic_t sep_tg_pt_ref_cnt; 902 spinlock_t sep_alua_lock; 903 struct mutex sep_tg_pt_md_mutex; 904 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 905 struct se_lun *sep_lun; 906 struct se_portal_group *sep_tpg; 907 struct list_head sep_alua_list; 908 struct list_head sep_list; 909 }; 910 911 struct se_tpg_np { 912 struct se_portal_group *tpg_np_parent; 913 struct config_group tpg_np_group; 914 }; 915 916 struct se_portal_group { 917 /* Type of target portal group, see transport_tpg_type_table */ 918 enum transport_tpg_type_table se_tpg_type; 919 /* Number of ACLed Initiator Nodes for this TPG */ 920 u32 num_node_acls; 921 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 922 atomic_t tpg_pr_ref_count; 923 /* Spinlock for adding/removing ACLed Nodes */ 924 spinlock_t acl_node_lock; 925 /* Spinlock for adding/removing sessions */ 926 spinlock_t session_lock; 927 spinlock_t tpg_lun_lock; 928 /* Pointer to $FABRIC_MOD portal group */ 929 void *se_tpg_fabric_ptr; 930 struct list_head se_tpg_node; 931 /* linked list for initiator ACL list */ 932 struct list_head acl_node_list; 933 struct se_lun *tpg_lun_list; 934 struct se_lun tpg_virt_lun0; 935 /* List of TCM sessions associated wth this TPG */ 936 struct list_head tpg_sess_list; 937 /* Pointer to $FABRIC_MOD dependent code */ 938 struct target_core_fabric_ops *se_tpg_tfo; 939 struct se_wwn *se_tpg_wwn; 940 struct config_group tpg_group; 941 struct config_group *tpg_default_groups[6]; 942 struct config_group tpg_lun_group; 943 struct config_group tpg_np_group; 944 struct config_group tpg_acl_group; 945 struct config_group tpg_attrib_group; 946 struct config_group tpg_param_group; 947 }; 948 949 struct se_wwn { 950 struct target_fabric_configfs *wwn_tf; 951 struct config_group wwn_group; 952 struct config_group *wwn_default_groups[2]; 953 struct config_group fabric_stat_group; 954 }; 955 956 #endif /* TARGET_CORE_BASE_H */ 957