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 */ 125enum hba_flags_table { 126 HBA_FLAGS_INTERNAL_USE = 0x01, 127 HBA_FLAGS_PSCSI_MODE = 0x02, 128}; 129 130/* struct se_lun->lun_status */ 131enum 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 */ 137enum 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 */ 143enum 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 */ 155enum 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 */ 177enum 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 */ 188typedef unsigned __bitwise__ sense_reason_t; 189 190enum 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 219enum 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 */ 226enum 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 */ 237enum 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 */ 249typedef enum { 250 SCSI_INST_INDEX, 251 SCSI_DEVICE_INDEX, 252 SCSI_AUTH_INTR_INDEX, 253 SCSI_INDEX_TYPE_MAX 254} scsi_index_t; 255 256struct se_cmd; 257 258struct 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 264struct 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 271struct 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 289struct 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 300struct 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 309struct 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 337struct 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 346struct 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 356struct 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 367struct 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 406struct 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 431struct 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 446enum 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 460enum 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 467enum 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 473struct se_dif_v1_tuple { 474 __be16 guard_tag; 475 __be16 app_tag; 476 __be32 ref_tag; 477}; 478 479struct se_cmd { 480 /* SAM response code being sent to initiator */ 481 u8 scsi_status; 482 u8 scsi_asc; 483 u8 scsi_ascq; 484 u16 scsi_sense_length; 485 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 486 int alua_nonop_delay; 487 /* See include/linux/dma-mapping.h */ 488 enum dma_data_direction data_direction; 489 /* For SAM Task Attribute */ 490 int sam_task_attr; 491 /* Used for se_sess->sess_tag_pool */ 492 unsigned int map_tag; 493 /* Transport protocol dependent state, see transport_state_table */ 494 enum transport_state_table t_state; 495 unsigned cmd_wait_set:1; 496 unsigned unknown_data_length:1; 497 /* See se_cmd_flags_table */ 498 u32 se_cmd_flags; 499 u32 se_ordered_id; 500 /* Total size in bytes associated with command */ 501 u32 data_length; 502 u32 residual_count; 503 u32 orig_fe_lun; 504 /* Persistent Reservation key */ 505 u64 pr_res_key; 506 /* Used for sense data */ 507 void *sense_buffer; 508 struct list_head se_delayed_node; 509 struct list_head se_qf_node; 510 struct se_device *se_dev; 511 struct se_dev_entry *se_deve; 512 struct se_lun *se_lun; 513 /* Only used for internal passthrough and legacy TCM fabric modules */ 514 struct se_session *se_sess; 515 struct se_tmr_req *se_tmr_req; 516 struct list_head se_cmd_list; 517 struct completion cmd_wait_comp; 518 struct kref cmd_kref; 519 struct target_core_fabric_ops *se_tfo; 520 sense_reason_t (*execute_cmd)(struct se_cmd *); 521 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *, 522 u32, enum dma_data_direction); 523 sense_reason_t (*transport_complete_callback)(struct se_cmd *); 524 525 unsigned char *t_task_cdb; 526 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 527 unsigned long long t_task_lba; 528 unsigned int t_task_nolb; 529 unsigned int transport_state; 530#define CMD_T_ABORTED (1 << 0) 531#define CMD_T_ACTIVE (1 << 1) 532#define CMD_T_COMPLETE (1 << 2) 533#define CMD_T_SENT (1 << 4) 534#define CMD_T_STOP (1 << 5) 535#define CMD_T_DEV_ACTIVE (1 << 7) 536#define CMD_T_REQUEST_STOP (1 << 8) 537#define CMD_T_BUSY (1 << 9) 538 spinlock_t t_state_lock; 539 struct completion t_transport_stop_comp; 540 541 struct work_struct work; 542 543 struct scatterlist *t_data_sg; 544 struct scatterlist *t_data_sg_orig; 545 unsigned int t_data_nents; 546 unsigned int t_data_nents_orig; 547 void *t_data_vmap; 548 struct scatterlist *t_bidi_data_sg; 549 unsigned int t_bidi_data_nents; 550 551 struct list_head state_list; 552 bool state_active; 553 554 /* old task stop completion, consider merging with some of the above */ 555 struct completion task_stop_comp; 556 557 /* backend private data */ 558 void *priv; 559 560 /* Used for lun->lun_ref counting */ 561 int lun_ref_active; 562 563 /* DIF related members */ 564 enum target_prot_op prot_op; 565 enum target_prot_type prot_type; 566 u8 prot_checks; 567 u32 prot_length; 568 u32 reftag_seed; 569 struct scatterlist *t_prot_sg; 570 unsigned int t_prot_nents; 571 sense_reason_t pi_err; 572 sector_t bad_sector; 573 bool prot_pto; 574}; 575 576struct se_ua { 577 u8 ua_asc; 578 u8 ua_ascq; 579 struct se_node_acl *ua_nacl; 580 struct list_head ua_nacl_list; 581}; 582 583struct se_node_acl { 584 char initiatorname[TRANSPORT_IQN_LEN]; 585 /* Used to signal demo mode created ACL, disabled by default */ 586 bool dynamic_node_acl; 587 bool acl_stop:1; 588 u32 queue_depth; 589 u32 acl_index; 590#define MAX_ACL_TAG_SIZE 64 591 char acl_tag[MAX_ACL_TAG_SIZE]; 592 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 593 atomic_t acl_pr_ref_count; 594 struct se_dev_entry **device_list; 595 struct se_session *nacl_sess; 596 struct se_portal_group *se_tpg; 597 spinlock_t device_list_lock; 598 spinlock_t nacl_sess_lock; 599 struct config_group acl_group; 600 struct config_group acl_attrib_group; 601 struct config_group acl_auth_group; 602 struct config_group acl_param_group; 603 struct config_group acl_fabric_stat_group; 604 struct config_group *acl_default_groups[5]; 605 struct list_head acl_list; 606 struct list_head acl_sess_list; 607 struct completion acl_free_comp; 608 struct kref acl_kref; 609}; 610 611struct se_session { 612 unsigned sess_tearing_down:1; 613 u64 sess_bin_isid; 614 enum target_prot_op sup_prot_ops; 615 struct se_node_acl *se_node_acl; 616 struct se_portal_group *se_tpg; 617 void *fabric_sess_ptr; 618 struct list_head sess_list; 619 struct list_head sess_acl_list; 620 struct list_head sess_cmd_list; 621 struct list_head sess_wait_list; 622 spinlock_t sess_cmd_lock; 623 struct kref sess_kref; 624 void *sess_cmd_map; 625 struct percpu_ida sess_tag_pool; 626}; 627 628struct se_device; 629struct se_transform_info; 630struct scatterlist; 631 632struct se_ml_stat_grps { 633 struct config_group stat_group; 634 struct config_group scsi_auth_intr_group; 635 struct config_group scsi_att_intr_port_group; 636}; 637 638struct se_lun_acl { 639 char initiatorname[TRANSPORT_IQN_LEN]; 640 u32 mapped_lun; 641 struct se_node_acl *se_lun_nacl; 642 struct se_lun *se_lun; 643 struct list_head lacl_list; 644 struct config_group se_lun_group; 645 struct se_ml_stat_grps ml_stat_grps; 646}; 647 648struct se_dev_entry { 649 bool def_pr_registered; 650 /* See transport_lunflags_table */ 651 u32 lun_flags; 652 u32 mapped_lun; 653 u32 total_cmds; 654 u64 pr_res_key; 655 u64 creation_time; 656 u32 attach_count; 657 u64 read_bytes; 658 u64 write_bytes; 659 atomic_t ua_count; 660 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 661 atomic_t pr_ref_count; 662 struct se_lun_acl *se_lun_acl; 663 spinlock_t ua_lock; 664 struct se_lun *se_lun; 665 struct list_head alua_port_list; 666 struct list_head ua_list; 667}; 668 669struct se_dev_attrib { 670 int emulate_model_alias; 671 int emulate_dpo; 672 int emulate_fua_write; 673 int emulate_fua_read; 674 int emulate_write_cache; 675 int emulate_ua_intlck_ctrl; 676 int emulate_tas; 677 int emulate_tpu; 678 int emulate_tpws; 679 int emulate_caw; 680 int emulate_3pc; 681 int pi_prot_format; 682 enum target_prot_type pi_prot_type; 683 enum target_prot_type hw_pi_prot_type; 684 int enforce_pr_isids; 685 int force_pr_aptpl; 686 int is_nonrot; 687 int emulate_rest_reord; 688 u32 hw_block_size; 689 u32 block_size; 690 u32 hw_max_sectors; 691 u32 fabric_max_sectors; 692 u32 optimal_sectors; 693 u32 hw_queue_depth; 694 u32 queue_depth; 695 u32 max_unmap_lba_count; 696 u32 max_unmap_block_desc_count; 697 u32 unmap_granularity; 698 u32 unmap_granularity_alignment; 699 u32 max_write_same_len; 700 u32 max_bytes_per_io; 701 struct se_device *da_dev; 702 struct config_group da_group; 703}; 704 705struct se_port_stat_grps { 706 struct config_group stat_group; 707 struct config_group scsi_port_group; 708 struct config_group scsi_tgt_port_group; 709 struct config_group scsi_transport_group; 710}; 711 712struct se_lun { 713#define SE_LUN_LINK_MAGIC 0xffff7771 714 u32 lun_link_magic; 715 /* See transport_lun_status_table */ 716 enum transport_lun_status_table lun_status; 717 u32 lun_access; 718 u32 lun_flags; 719 u32 unpacked_lun; 720 atomic_t lun_acl_count; 721 spinlock_t lun_acl_lock; 722 spinlock_t lun_sep_lock; 723 struct completion lun_shutdown_comp; 724 struct list_head lun_acl_list; 725 struct se_device *lun_se_dev; 726 struct se_port *lun_sep; 727 struct config_group lun_group; 728 struct se_port_stat_grps port_stat_grps; 729 struct completion lun_ref_comp; 730 struct percpu_ref lun_ref; 731}; 732 733struct se_dev_stat_grps { 734 struct config_group stat_group; 735 struct config_group scsi_dev_group; 736 struct config_group scsi_tgt_dev_group; 737 struct config_group scsi_lu_group; 738}; 739 740struct se_device { 741#define SE_DEV_LINK_MAGIC 0xfeeddeef 742 u32 dev_link_magic; 743 /* RELATIVE TARGET PORT IDENTIFER Counter */ 744 u16 dev_rpti_counter; 745 /* Used for SAM Task Attribute ordering */ 746 u32 dev_cur_ordered_id; 747 u32 dev_flags; 748#define DF_CONFIGURED 0x00000001 749#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 750#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 751#define DF_USING_UDEV_PATH 0x00000008 752#define DF_USING_ALIAS 0x00000010 753 u32 dev_port_count; 754 /* Physical device queue depth */ 755 u32 queue_depth; 756 /* Used for SPC-2 reservations enforce of ISIDs */ 757 u64 dev_res_bin_isid; 758 /* Pointer to transport specific device structure */ 759 u32 dev_index; 760 u64 creation_time; 761 atomic_long_t num_resets; 762 atomic_long_t num_cmds; 763 atomic_long_t read_bytes; 764 atomic_long_t write_bytes; 765 /* Active commands on this virtual SE device */ 766 atomic_t simple_cmds; 767 atomic_t dev_ordered_id; 768 atomic_t dev_ordered_sync; 769 atomic_t dev_qf_count; 770 int export_count; 771 spinlock_t delayed_cmd_lock; 772 spinlock_t execute_task_lock; 773 spinlock_t dev_reservation_lock; 774 unsigned int dev_reservation_flags; 775#define DRF_SPC2_RESERVATIONS 0x00000001 776#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 777 spinlock_t se_port_lock; 778 spinlock_t se_tmr_lock; 779 spinlock_t qf_cmd_lock; 780 struct semaphore caw_sem; 781 /* Used for legacy SPC-2 reservationsa */ 782 struct se_node_acl *dev_reserved_node_acl; 783 /* Used for ALUA Logical Unit Group membership */ 784 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 785 /* Used for SPC-3 Persistent Reservations */ 786 struct t10_pr_registration *dev_pr_res_holder; 787 struct list_head dev_sep_list; 788 struct list_head dev_tmr_list; 789 struct workqueue_struct *tmr_wq; 790 struct work_struct qf_work_queue; 791 struct list_head delayed_cmd_list; 792 struct list_head state_list; 793 struct list_head qf_cmd_list; 794 struct list_head g_dev_node; 795 /* Pointer to associated SE HBA */ 796 struct se_hba *se_hba; 797 /* T10 Inquiry and VPD WWN Information */ 798 struct t10_wwn t10_wwn; 799 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 800 struct t10_alua t10_alua; 801 /* T10 SPC-2 + SPC-3 Reservations */ 802 struct t10_reservation t10_pr; 803 struct se_dev_attrib dev_attrib; 804 struct config_group dev_group; 805 struct config_group dev_pr_group; 806 struct se_dev_stat_grps dev_stat_grps; 807#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 808 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 809#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 810 unsigned char udev_path[SE_UDEV_PATH_LEN]; 811 /* Pointer to template of function pointers for transport */ 812 struct se_subsystem_api *transport; 813 /* Linked list for struct se_hba struct se_device list */ 814 struct list_head dev_list; 815 struct se_lun xcopy_lun; 816 /* Protection Information */ 817 int prot_length; 818}; 819 820struct se_hba { 821 u16 hba_tpgt; 822 u32 hba_id; 823 /* See hba_flags_table */ 824 u32 hba_flags; 825 /* Virtual iSCSI devices attached. */ 826 u32 dev_count; 827 u32 hba_index; 828 /* Pointer to transport specific host structure. */ 829 void *hba_ptr; 830 struct list_head hba_node; 831 spinlock_t device_lock; 832 struct config_group hba_group; 833 struct mutex hba_access_mutex; 834 struct se_subsystem_api *transport; 835}; 836 837struct scsi_port_stats { 838 u64 cmd_pdus; 839 u64 tx_data_octets; 840 u64 rx_data_octets; 841}; 842 843struct se_port { 844 /* RELATIVE TARGET PORT IDENTIFER */ 845 u16 sep_rtpi; 846 int sep_tg_pt_secondary_stat; 847 int sep_tg_pt_secondary_write_md; 848 u32 sep_index; 849 struct scsi_port_stats sep_stats; 850 /* Used for ALUA Target Port Groups membership */ 851 atomic_t sep_tg_pt_secondary_offline; 852 /* Used for PR ALL_TG_PT=1 */ 853 atomic_t sep_tg_pt_ref_cnt; 854 spinlock_t sep_alua_lock; 855 struct mutex sep_tg_pt_md_mutex; 856 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 857 struct se_lun *sep_lun; 858 struct se_portal_group *sep_tpg; 859 struct list_head sep_alua_list; 860 struct list_head sep_list; 861}; 862 863struct se_tpg_np { 864 struct se_portal_group *tpg_np_parent; 865 struct config_group tpg_np_group; 866}; 867 868struct se_portal_group { 869 /* Type of target portal group, see transport_tpg_type_table */ 870 enum transport_tpg_type_table se_tpg_type; 871 /* Number of ACLed Initiator Nodes for this TPG */ 872 u32 num_node_acls; 873 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 874 atomic_t tpg_pr_ref_count; 875 /* Spinlock for adding/removing ACLed Nodes */ 876 spinlock_t acl_node_lock; 877 /* Spinlock for adding/removing sessions */ 878 spinlock_t session_lock; 879 spinlock_t tpg_lun_lock; 880 /* Pointer to $FABRIC_MOD portal group */ 881 void *se_tpg_fabric_ptr; 882 struct list_head se_tpg_node; 883 /* linked list for initiator ACL list */ 884 struct list_head acl_node_list; 885 struct se_lun **tpg_lun_list; 886 struct se_lun tpg_virt_lun0; 887 /* List of TCM sessions associated wth this TPG */ 888 struct list_head tpg_sess_list; 889 /* Pointer to $FABRIC_MOD dependent code */ 890 struct target_core_fabric_ops *se_tpg_tfo; 891 struct se_wwn *se_tpg_wwn; 892 struct config_group tpg_group; 893 struct config_group *tpg_default_groups[7]; 894 struct config_group tpg_lun_group; 895 struct config_group tpg_np_group; 896 struct config_group tpg_acl_group; 897 struct config_group tpg_attrib_group; 898 struct config_group tpg_auth_group; 899 struct config_group tpg_param_group; 900}; 901 902struct se_wwn { 903 struct target_fabric_configfs *wwn_tf; 904 struct config_group wwn_group; 905 struct config_group *wwn_default_groups[2]; 906 struct config_group fabric_stat_group; 907}; 908 909static inline void atomic_inc_mb(atomic_t *v) 910{ 911 smp_mb__before_atomic(); 912 atomic_inc(v); 913 smp_mb__after_atomic(); 914} 915 916static inline void atomic_dec_mb(atomic_t *v) 917{ 918 smp_mb__before_atomic(); 919 atomic_dec(v); 920 smp_mb__after_atomic(); 921} 922 923#endif /* TARGET_CORE_BASE_H */ 924