1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef TARGET_CORE_BASE_H 3 #define TARGET_CORE_BASE_H 4 5 #include <linux/configfs.h> /* struct config_group */ 6 #include <linux/dma-direction.h> /* enum dma_data_direction */ 7 #include <linux/sbitmap.h> 8 #include <linux/percpu-refcount.h> 9 #include <linux/semaphore.h> /* struct semaphore */ 10 #include <linux/completion.h> 11 12 #define TARGET_CORE_VERSION "v5.0" 13 14 /* 15 * Maximum size of a CDB that can be stored in se_cmd without allocating 16 * memory dynamically for the CDB. 17 */ 18 #define TCM_MAX_COMMAND_SIZE 32 19 /* 20 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently 21 * defined 96, but the real limit is 252 (or 260 including the header) 22 */ 23 #define TRANSPORT_SENSE_BUFFER 96 24 /* Used by transport_send_check_condition_and_sense() */ 25 #define SPC_SENSE_KEY_OFFSET 2 26 #define SPC_ADD_SENSE_LEN_OFFSET 7 27 #define SPC_DESC_TYPE_OFFSET 8 28 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9 29 #define SPC_VALIDITY_OFFSET 10 30 #define SPC_ASC_KEY_OFFSET 12 31 #define SPC_ASCQ_KEY_OFFSET 13 32 #define TRANSPORT_IQN_LEN 224 33 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ 34 #define LU_GROUP_NAME_BUF 256 35 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ 36 #define TG_PT_GROUP_NAME_BUF 256 37 /* Used to parse VPD into struct t10_vpd */ 38 #define VPD_TMP_BUF_SIZE 254 39 /* Used by transport_generic_cmd_sequencer() */ 40 #define READ_BLOCK_LEN 6 41 #define READ_CAP_LEN 8 42 #define READ_POSITION_LEN 20 43 #define INQUIRY_LEN 36 44 /* Used by transport_get_inquiry_vpd_serial() */ 45 #define INQUIRY_VPD_SERIAL_LEN 254 46 /* Used by transport_get_inquiry_vpd_device_ident() */ 47 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 48 49 #define INQUIRY_VENDOR_LEN 8 50 #define INQUIRY_MODEL_LEN 16 51 #define INQUIRY_REVISION_LEN 4 52 53 /* Attempts before moving from SHORT to LONG */ 54 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 55 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ 56 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ 57 58 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ 59 60 /* struct se_dev_attrib sanity values */ 61 /* Default max_unmap_lba_count */ 62 #define DA_MAX_UNMAP_LBA_COUNT 0 63 /* Default max_unmap_block_desc_count */ 64 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 65 /* Default unmap_granularity */ 66 #define DA_UNMAP_GRANULARITY_DEFAULT 0 67 /* Default unmap_granularity_alignment */ 68 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 69 /* Default unmap_zeroes_data */ 70 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0 71 /* Default max_write_same_len, disabled by default */ 72 #define DA_MAX_WRITE_SAME_LEN 0 73 /* Use a model alias based on the configfs backend device name */ 74 #define DA_EMULATE_MODEL_ALIAS 0 75 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 76 #define DA_EMULATE_WRITE_CACHE 0 77 /* Emulation for TASK_ABORTED status (TAS) by default */ 78 #define DA_EMULATE_TAS 1 79 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 80 #define DA_EMULATE_TPU 0 81 /* 82 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 83 * block/blk-lib.c:blkdev_issue_discard() 84 */ 85 #define DA_EMULATE_TPWS 0 86 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */ 87 #define DA_EMULATE_CAW 1 88 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */ 89 #define DA_EMULATE_3PC 1 90 /* No Emulation for PSCSI by default */ 91 #define DA_EMULATE_ALUA 0 92 /* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */ 93 #define DA_EMULATE_PR 1 94 /* Emulation for REPORT SUPPORTED OPERATION CODES */ 95 #define DA_EMULATE_RSOC 1 96 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 97 #define DA_ENFORCE_PR_ISIDS 1 98 /* Force SPC-3 PR Activate Persistence across Target Power Loss */ 99 #define DA_FORCE_PR_APTPL 0 100 #define DA_STATUS_MAX_SECTORS_MIN 16 101 #define DA_STATUS_MAX_SECTORS_MAX 8192 102 /* By default don't report non-rotating (solid state) medium */ 103 #define DA_IS_NONROT 0 104 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 105 #define DA_EMULATE_REST_REORD 0 106 107 #define SE_INQUIRY_BUF 1024 108 #define SE_MODE_PAGE_BUF 512 109 #define SE_SENSE_BUF 96 110 111 enum target_submit_type { 112 /* Use the fabric driver's default submission type */ 113 TARGET_FABRIC_DEFAULT_SUBMIT, 114 /* Submit from the calling context */ 115 TARGET_DIRECT_SUBMIT, 116 /* Defer submission to the LIO workqueue */ 117 TARGET_QUEUE_SUBMIT, 118 }; 119 120 /* struct se_hba->hba_flags */ 121 enum hba_flags_table { 122 HBA_FLAGS_INTERNAL_USE = 0x01, 123 HBA_FLAGS_PSCSI_MODE = 0x02, 124 }; 125 126 /* Special transport agnostic struct se_cmd->t_states */ 127 enum transport_state_table { 128 TRANSPORT_NO_STATE = 0, 129 TRANSPORT_NEW_CMD = 1, 130 TRANSPORT_WRITE_PENDING = 3, 131 TRANSPORT_PROCESSING = 5, 132 TRANSPORT_COMPLETE = 6, 133 TRANSPORT_ISTATE_PROCESSING = 11, 134 TRANSPORT_COMPLETE_QF_WP = 18, 135 TRANSPORT_COMPLETE_QF_OK = 19, 136 TRANSPORT_COMPLETE_QF_ERR = 20, 137 }; 138 139 /* Used for struct se_cmd->se_cmd_flags */ 140 enum se_cmd_flags_table { 141 SCF_SUPPORTED_SAM_OPCODE = (1 << 0), 142 SCF_TRANSPORT_TASK_SENSE = (1 << 1), 143 SCF_EMULATED_TASK_SENSE = (1 << 2), 144 SCF_SCSI_DATA_CDB = (1 << 3), 145 SCF_SCSI_TMR_CDB = (1 << 4), 146 SCF_FUA = (1 << 5), 147 SCF_SE_LUN_CMD = (1 << 6), 148 SCF_BIDI = (1 << 7), 149 SCF_SENT_CHECK_CONDITION = (1 << 8), 150 SCF_OVERFLOW_BIT = (1 << 9), 151 SCF_UNDERFLOW_BIT = (1 << 10), 152 SCF_ALUA_NON_OPTIMIZED = (1 << 11), 153 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = (1 << 12), 154 SCF_COMPARE_AND_WRITE = (1 << 13), 155 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = (1 << 14), 156 SCF_ACK_KREF = (1 << 15), 157 SCF_USE_CPUID = (1 << 16), 158 SCF_TASK_ATTR_SET = (1 << 17), 159 SCF_TREAT_READ_AS_NORMAL = (1 << 18), 160 }; 161 162 /* 163 * Used by transport_send_check_condition_and_sense() 164 * to signal which ASC/ASCQ sense payload should be built. 165 */ 166 typedef unsigned __bitwise sense_reason_t; 167 168 enum tcm_sense_reason_table { 169 #define R(x) (__force sense_reason_t )(x) 170 TCM_NO_SENSE = R(0x00), 171 TCM_NON_EXISTENT_LUN = R(0x01), 172 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 173 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 174 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 175 TCM_SERVICE_CRC_ERROR = R(0x05), 176 TCM_SNACK_REJECTED = R(0x06), 177 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 178 TCM_INVALID_CDB_FIELD = R(0x08), 179 TCM_INVALID_PARAMETER_LIST = R(0x09), 180 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 181 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 182 TCM_WRITE_PROTECTED = R(0x0c), 183 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 184 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 185 186 TCM_RESERVATION_CONFLICT = R(0x10), 187 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 188 TCM_OUT_OF_RESOURCES = R(0x12), 189 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 190 TCM_MISCOMPARE_VERIFY = R(0x14), 191 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 192 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 193 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 194 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18), 195 TCM_TOO_MANY_TARGET_DESCS = R(0x19), 196 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a), 197 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b), 198 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c), 199 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d), 200 TCM_LUN_BUSY = R(0x1e), 201 TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f), 202 TCM_ALUA_TG_PT_STANDBY = R(0x20), 203 TCM_ALUA_TG_PT_UNAVAILABLE = R(0x21), 204 TCM_ALUA_STATE_TRANSITION = R(0x22), 205 TCM_ALUA_OFFLINE = R(0x23), 206 #undef R 207 }; 208 209 enum target_sc_flags_table { 210 TARGET_SCF_BIDI_OP = 0x01, 211 TARGET_SCF_ACK_KREF = 0x02, 212 TARGET_SCF_UNKNOWN_SIZE = 0x04, 213 TARGET_SCF_USE_CPUID = 0x08, 214 }; 215 216 /* fabric independent task management function values */ 217 enum tcm_tmreq_table { 218 TMR_ABORT_TASK = 1, 219 TMR_ABORT_TASK_SET = 2, 220 TMR_CLEAR_ACA = 3, 221 TMR_CLEAR_TASK_SET = 4, 222 TMR_LUN_RESET = 5, 223 TMR_TARGET_WARM_RESET = 6, 224 TMR_TARGET_COLD_RESET = 7, 225 TMR_LUN_RESET_PRO = 0x80, 226 TMR_UNKNOWN = 0xff, 227 }; 228 229 /* fabric independent task management response values */ 230 enum tcm_tmrsp_table { 231 TMR_FUNCTION_FAILED = 0, 232 TMR_FUNCTION_COMPLETE = 1, 233 TMR_TASK_DOES_NOT_EXIST = 2, 234 TMR_LUN_DOES_NOT_EXIST = 3, 235 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, 236 TMR_FUNCTION_REJECTED = 5, 237 }; 238 239 /* 240 * Used for target SCSI statistics 241 */ 242 typedef enum { 243 SCSI_INST_INDEX, 244 SCSI_AUTH_INTR_INDEX, 245 SCSI_INDEX_TYPE_MAX 246 } scsi_index_t; 247 248 struct se_cmd; 249 250 struct t10_alua_lba_map_member { 251 struct list_head lba_map_mem_list; 252 int lba_map_mem_alua_state; 253 int lba_map_mem_alua_pg_id; 254 }; 255 256 struct t10_alua_lba_map { 257 u64 lba_map_first_lba; 258 u64 lba_map_last_lba; 259 struct list_head lba_map_list; 260 struct list_head lba_map_mem_list; 261 }; 262 263 struct t10_alua { 264 /* ALUA Target Port Group ID */ 265 u16 alua_tg_pt_gps_counter; 266 u32 alua_tg_pt_gps_count; 267 /* Referrals support */ 268 spinlock_t lba_map_lock; 269 u32 lba_map_segment_size; 270 u32 lba_map_segment_multiplier; 271 struct list_head lba_map_list; 272 spinlock_t tg_pt_gps_lock; 273 struct se_device *t10_dev; 274 /* Used for default ALUA Target Port Group */ 275 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 276 /* Used for default ALUA Target Port Group ConfigFS group */ 277 struct config_group alua_tg_pt_gps_group; 278 struct list_head tg_pt_gps_list; 279 }; 280 281 struct t10_alua_lu_gp { 282 u16 lu_gp_id; 283 int lu_gp_valid_id; 284 u32 lu_gp_members; 285 atomic_t lu_gp_ref_cnt; 286 spinlock_t lu_gp_lock; 287 struct config_group lu_gp_group; 288 struct list_head lu_gp_node; 289 struct list_head lu_gp_mem_list; 290 }; 291 292 struct t10_alua_lu_gp_member { 293 bool lu_gp_assoc; 294 atomic_t lu_gp_mem_ref_cnt; 295 spinlock_t lu_gp_mem_lock; 296 struct t10_alua_lu_gp *lu_gp; 297 struct se_device *lu_gp_mem_dev; 298 struct list_head lu_gp_mem_list; 299 }; 300 301 struct t10_alua_tg_pt_gp { 302 u16 tg_pt_gp_id; 303 int tg_pt_gp_valid_id; 304 int tg_pt_gp_alua_supported_states; 305 int tg_pt_gp_alua_access_status; 306 int tg_pt_gp_alua_access_type; 307 int tg_pt_gp_nonop_delay_msecs; 308 int tg_pt_gp_trans_delay_msecs; 309 int tg_pt_gp_implicit_trans_secs; 310 int tg_pt_gp_pref; 311 int tg_pt_gp_write_metadata; 312 u32 tg_pt_gp_members; 313 int tg_pt_gp_alua_access_state; 314 atomic_t tg_pt_gp_ref_cnt; 315 spinlock_t tg_pt_gp_lock; 316 struct mutex tg_pt_gp_transition_mutex; 317 struct se_device *tg_pt_gp_dev; 318 struct config_group tg_pt_gp_group; 319 struct list_head tg_pt_gp_list; 320 struct list_head tg_pt_gp_lun_list; 321 struct se_lun *tg_pt_gp_alua_lun; 322 struct se_node_acl *tg_pt_gp_alua_nacl; 323 }; 324 325 struct t10_vpd { 326 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 327 int protocol_identifier_set; 328 u32 protocol_identifier; 329 u32 device_identifier_code_set; 330 u32 association; 331 u32 device_identifier_type; 332 struct list_head vpd_list; 333 }; 334 335 struct t10_wwn { 336 /* 337 * SCSI left aligned strings may not be null terminated. +1 to ensure a 338 * null terminator is always present. 339 */ 340 char vendor[INQUIRY_VENDOR_LEN + 1]; 341 char model[INQUIRY_MODEL_LEN + 1]; 342 char revision[INQUIRY_REVISION_LEN + 1]; 343 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 344 u32 company_id; 345 spinlock_t t10_vpd_lock; 346 struct se_device *t10_dev; 347 struct config_group t10_wwn_group; 348 struct list_head t10_vpd_list; 349 }; 350 351 struct t10_pr_registration { 352 /* Used for fabrics that contain WWN+ISID */ 353 #define PR_REG_ISID_LEN 16 354 /* PR_REG_ISID_LEN + ',i,0x' */ 355 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 356 char pr_reg_isid[PR_REG_ISID_LEN]; 357 /* Used during APTPL metadata reading */ 358 #define PR_APTPL_MAX_IPORT_LEN 256 359 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 360 /* Used during APTPL metadata reading */ 361 #define PR_APTPL_MAX_TPORT_LEN 256 362 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 363 u16 pr_aptpl_rpti; 364 u16 pr_reg_tpgt; 365 /* Reservation effects all target ports */ 366 int pr_reg_all_tg_pt; 367 /* Activate Persistence across Target Power Loss */ 368 int pr_reg_aptpl; 369 int pr_res_holder; 370 int pr_res_type; 371 int pr_res_scope; 372 /* Used for fabric initiator WWPNs using a ISID */ 373 bool isid_present_at_reg; 374 u64 pr_res_mapped_lun; 375 u64 pr_aptpl_target_lun; 376 u16 tg_pt_sep_rtpi; 377 u32 pr_res_generation; 378 u64 pr_reg_bin_isid; 379 u64 pr_res_key; 380 atomic_t pr_res_holders; 381 struct se_node_acl *pr_reg_nacl; 382 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */ 383 struct se_dev_entry *pr_reg_deve; 384 struct list_head pr_reg_list; 385 struct list_head pr_reg_abort_list; 386 struct list_head pr_reg_aptpl_list; 387 struct list_head pr_reg_atp_list; 388 struct list_head pr_reg_atp_mem_list; 389 }; 390 391 struct t10_reservation { 392 /* Reservation effects all target ports */ 393 int pr_all_tg_pt; 394 /* Activate Persistence across Target Power Loss enabled 395 * for SCSI device */ 396 int pr_aptpl_active; 397 #define PR_APTPL_BUF_LEN 262144 398 u32 pr_generation; 399 spinlock_t registration_lock; 400 spinlock_t aptpl_reg_lock; 401 /* 402 * This will always be set by one individual I_T Nexus. 403 * However with all_tg_pt=1, other I_T Nexus from the 404 * same initiator can access PR reg/res info on a different 405 * target port. 406 * 407 * There is also the 'All Registrants' case, where there is 408 * a single *pr_res_holder of the reservation, but all 409 * registrations are considered reservation holders. 410 */ 411 struct se_node_acl *pr_res_holder; 412 struct list_head registration_list; 413 struct list_head aptpl_reg_list; 414 }; 415 416 struct se_tmr_req { 417 /* Task Management function to be performed */ 418 u8 function; 419 /* Task Management response to send */ 420 u8 response; 421 int call_transport; 422 /* Reference to ITT that Task Mgmt should be performed */ 423 u64 ref_task_tag; 424 void *fabric_tmr_ptr; 425 struct se_cmd *task_cmd; 426 struct se_device *tmr_dev; 427 struct list_head tmr_list; 428 }; 429 430 enum target_prot_op { 431 TARGET_PROT_NORMAL = 0, 432 TARGET_PROT_DIN_INSERT = (1 << 0), 433 TARGET_PROT_DOUT_INSERT = (1 << 1), 434 TARGET_PROT_DIN_STRIP = (1 << 2), 435 TARGET_PROT_DOUT_STRIP = (1 << 3), 436 TARGET_PROT_DIN_PASS = (1 << 4), 437 TARGET_PROT_DOUT_PASS = (1 << 5), 438 }; 439 440 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \ 441 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \ 442 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS 443 444 enum target_prot_type { 445 TARGET_DIF_TYPE0_PROT, 446 TARGET_DIF_TYPE1_PROT, 447 TARGET_DIF_TYPE2_PROT, 448 TARGET_DIF_TYPE3_PROT, 449 }; 450 451 /* Emulation for UNIT ATTENTION Interlock Control */ 452 enum target_ua_intlck_ctrl { 453 TARGET_UA_INTLCK_CTRL_CLEAR = 0, 454 TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1, 455 TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2, 456 }; 457 458 enum target_core_dif_check { 459 TARGET_DIF_CHECK_GUARD = 0x1 << 0, 460 TARGET_DIF_CHECK_APPTAG = 0x1 << 1, 461 TARGET_DIF_CHECK_REFTAG = 0x1 << 2, 462 }; 463 464 /* for sam_task_attr */ 465 #define TCM_SIMPLE_TAG 0x20 466 #define TCM_HEAD_TAG 0x21 467 #define TCM_ORDERED_TAG 0x22 468 #define TCM_ACA_TAG 0x24 469 470 struct se_cmd { 471 /* Used for fail with specific sense codes */ 472 sense_reason_t sense_reason; 473 /* SAM response code being sent to initiator */ 474 u8 scsi_status; 475 u16 scsi_sense_length; 476 unsigned unknown_data_length:1; 477 bool state_active:1; 478 u64 tag; /* SAM command identifier aka task tag */ 479 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 480 int alua_nonop_delay; 481 /* See include/linux/dma-mapping.h */ 482 enum dma_data_direction data_direction; 483 /* For SAM Task Attribute */ 484 int sam_task_attr; 485 /* Used for se_sess->sess_tag_pool */ 486 unsigned int map_tag; 487 int map_cpu; 488 /* Transport protocol dependent state, see transport_state_table */ 489 enum transport_state_table t_state; 490 /* See se_cmd_flags_table */ 491 u32 se_cmd_flags; 492 /* Total size in bytes associated with command */ 493 u32 data_length; 494 u32 residual_count; 495 u64 orig_fe_lun; 496 /* Persistent Reservation key */ 497 u64 pr_res_key; 498 /* Used for sense data */ 499 void *sense_buffer; 500 struct list_head se_delayed_node; 501 struct list_head se_qf_node; 502 struct se_device *se_dev; 503 struct se_lun *se_lun; 504 /* Only used for internal passthrough and legacy TCM fabric modules */ 505 struct se_session *se_sess; 506 struct target_cmd_counter *cmd_cnt; 507 struct se_tmr_req *se_tmr_req; 508 struct llist_node se_cmd_list; 509 struct completion *free_compl; 510 struct completion *abrt_compl; 511 const struct target_core_fabric_ops *se_tfo; 512 sense_reason_t (*execute_cmd)(struct se_cmd *); 513 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *); 514 void *protocol_data; 515 516 unsigned char *t_task_cdb; 517 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 518 unsigned long long t_task_lba; 519 unsigned int t_task_nolb; 520 unsigned int transport_state; 521 #define CMD_T_ABORTED (1 << 0) 522 #define CMD_T_ACTIVE (1 << 1) 523 #define CMD_T_COMPLETE (1 << 2) 524 #define CMD_T_SENT (1 << 4) 525 #define CMD_T_STOP (1 << 5) 526 #define CMD_T_TAS (1 << 10) 527 #define CMD_T_FABRIC_STOP (1 << 11) 528 spinlock_t t_state_lock; 529 struct kref cmd_kref; 530 struct completion t_transport_stop_comp; 531 532 struct work_struct work; 533 534 struct scatterlist *t_data_sg; 535 struct scatterlist *t_data_sg_orig; 536 unsigned int t_data_nents; 537 unsigned int t_data_nents_orig; 538 void *t_data_vmap; 539 struct scatterlist *t_bidi_data_sg; 540 unsigned int t_bidi_data_nents; 541 542 /* Used for lun->lun_ref counting */ 543 int lun_ref_active; 544 545 struct list_head state_list; 546 547 /* backend private data */ 548 void *priv; 549 550 /* DIF related members */ 551 enum target_prot_op prot_op; 552 enum target_prot_type prot_type; 553 u8 prot_checks; 554 bool prot_pto; 555 u32 prot_length; 556 u32 reftag_seed; 557 struct scatterlist *t_prot_sg; 558 unsigned int t_prot_nents; 559 sense_reason_t pi_err; 560 u64 sense_info; 561 /* 562 * CPU LIO will execute the cmd on. Defaults to the CPU the cmd is 563 * initialized on. Drivers can override. 564 */ 565 int cpuid; 566 }; 567 568 struct se_ua { 569 u8 ua_asc; 570 u8 ua_ascq; 571 struct list_head ua_nacl_list; 572 }; 573 574 struct se_node_acl { 575 char initiatorname[TRANSPORT_IQN_LEN]; 576 /* Used to signal demo mode created ACL, disabled by default */ 577 bool dynamic_node_acl; 578 bool dynamic_stop; 579 u32 queue_depth; 580 u32 acl_index; 581 enum target_prot_type saved_prot_type; 582 #define MAX_ACL_TAG_SIZE 64 583 char acl_tag[MAX_ACL_TAG_SIZE]; 584 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 585 atomic_t acl_pr_ref_count; 586 struct hlist_head lun_entry_hlist; 587 struct se_session *nacl_sess; 588 struct se_portal_group *se_tpg; 589 struct mutex lun_entry_mutex; 590 spinlock_t nacl_sess_lock; 591 struct config_group acl_group; 592 struct config_group acl_attrib_group; 593 struct config_group acl_auth_group; 594 struct config_group acl_param_group; 595 struct config_group acl_fabric_stat_group; 596 struct list_head acl_list; 597 struct list_head acl_sess_list; 598 struct completion acl_free_comp; 599 struct kref acl_kref; 600 }; 601 acl_to_nacl(struct config_item * item)602 static inline struct se_node_acl *acl_to_nacl(struct config_item *item) 603 { 604 return container_of(to_config_group(item), struct se_node_acl, 605 acl_group); 606 } 607 attrib_to_nacl(struct config_item * item)608 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item) 609 { 610 return container_of(to_config_group(item), struct se_node_acl, 611 acl_attrib_group); 612 } 613 auth_to_nacl(struct config_item * item)614 static inline struct se_node_acl *auth_to_nacl(struct config_item *item) 615 { 616 return container_of(to_config_group(item), struct se_node_acl, 617 acl_auth_group); 618 } 619 param_to_nacl(struct config_item * item)620 static inline struct se_node_acl *param_to_nacl(struct config_item *item) 621 { 622 return container_of(to_config_group(item), struct se_node_acl, 623 acl_param_group); 624 } 625 fabric_stat_to_nacl(struct config_item * item)626 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item) 627 { 628 return container_of(to_config_group(item), struct se_node_acl, 629 acl_fabric_stat_group); 630 } 631 632 struct target_cmd_counter { 633 struct percpu_ref refcnt; 634 wait_queue_head_t refcnt_wq; 635 struct completion stop_done; 636 atomic_t stopped; 637 }; 638 639 struct se_session { 640 u64 sess_bin_isid; 641 enum target_prot_op sup_prot_ops; 642 enum target_prot_type sess_prot_type; 643 struct se_node_acl *se_node_acl; 644 struct se_portal_group *se_tpg; 645 void *fabric_sess_ptr; 646 struct list_head sess_list; 647 struct list_head sess_acl_list; 648 spinlock_t sess_cmd_lock; 649 void *sess_cmd_map; 650 struct sbitmap_queue sess_tag_pool; 651 struct target_cmd_counter *cmd_cnt; 652 }; 653 654 struct se_device; 655 struct se_transform_info; 656 struct scatterlist; 657 658 struct se_ml_stat_grps { 659 struct config_group stat_group; 660 struct config_group scsi_auth_intr_group; 661 struct config_group scsi_att_intr_port_group; 662 }; 663 664 struct se_lun_acl { 665 u64 mapped_lun; 666 struct se_node_acl *se_lun_nacl; 667 struct se_lun *se_lun; 668 struct config_group se_lun_group; 669 struct se_ml_stat_grps ml_stat_grps; 670 }; 671 672 struct se_dev_entry { 673 u64 mapped_lun; 674 u64 pr_res_key; 675 u64 creation_time; 676 bool lun_access_ro; 677 u32 attach_count; 678 atomic_long_t total_cmds; 679 atomic_long_t read_bytes; 680 atomic_long_t write_bytes; 681 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 682 struct kref pr_kref; 683 struct completion pr_comp; 684 struct se_lun_acl *se_lun_acl; 685 spinlock_t ua_lock; 686 struct se_lun *se_lun; 687 #define DEF_PR_REG_ACTIVE 1 688 unsigned long deve_flags; 689 struct list_head alua_port_list; 690 struct list_head lun_link; 691 struct list_head ua_list; 692 struct hlist_node link; 693 struct rcu_head rcu_head; 694 }; 695 696 struct se_dev_attrib { 697 bool emulate_model_alias; 698 bool emulate_dpo; /* deprecated */ 699 bool emulate_fua_write; 700 bool emulate_fua_read; /* deprecated */ 701 bool emulate_write_cache; 702 enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl; 703 bool emulate_tas; 704 bool emulate_tpu; 705 bool emulate_tpws; 706 bool emulate_caw; 707 bool emulate_3pc; 708 bool emulate_pr; 709 bool emulate_rsoc; 710 enum target_prot_type pi_prot_type; 711 enum target_prot_type hw_pi_prot_type; 712 bool pi_prot_verify; 713 bool enforce_pr_isids; 714 bool force_pr_aptpl; 715 bool is_nonrot; 716 bool emulate_rest_reord; 717 bool unmap_zeroes_data; 718 u32 hw_block_size; 719 u32 block_size; 720 u32 hw_max_sectors; 721 u32 optimal_sectors; 722 u32 hw_queue_depth; 723 u32 queue_depth; 724 u32 max_unmap_lba_count; 725 u32 max_unmap_block_desc_count; 726 u32 unmap_granularity; 727 u32 unmap_granularity_alignment; 728 u32 max_write_same_len; 729 u8 submit_type; 730 struct se_device *da_dev; 731 struct config_group da_group; 732 }; 733 734 struct se_port_stat_grps { 735 struct config_group stat_group; 736 struct config_group scsi_port_group; 737 struct config_group scsi_tgt_port_group; 738 struct config_group scsi_transport_group; 739 }; 740 741 struct scsi_port_stats { 742 atomic_long_t cmd_pdus; 743 atomic_long_t tx_data_octets; 744 atomic_long_t rx_data_octets; 745 }; 746 747 struct se_lun { 748 u64 unpacked_lun; 749 bool lun_shutdown; 750 bool lun_access_ro; 751 u32 lun_index; 752 753 atomic_t lun_acl_count; 754 struct se_device __rcu *lun_se_dev; 755 756 struct list_head lun_deve_list; 757 spinlock_t lun_deve_lock; 758 759 /* ALUA state */ 760 int lun_tg_pt_secondary_stat; 761 int lun_tg_pt_secondary_write_md; 762 atomic_t lun_tg_pt_secondary_offline; 763 struct mutex lun_tg_pt_md_mutex; 764 765 /* ALUA target port group linkage */ 766 struct list_head lun_tg_pt_gp_link; 767 struct t10_alua_tg_pt_gp __rcu *lun_tg_pt_gp; 768 spinlock_t lun_tg_pt_gp_lock; 769 770 struct se_portal_group *lun_tpg; 771 struct scsi_port_stats lun_stats; 772 struct config_group lun_group; 773 struct se_port_stat_grps port_stat_grps; 774 struct completion lun_shutdown_comp; 775 struct percpu_ref lun_ref; 776 struct list_head lun_dev_link; 777 struct hlist_node link; 778 struct rcu_head rcu_head; 779 }; 780 781 struct se_dev_stat_grps { 782 struct config_group stat_group; 783 struct config_group scsi_dev_group; 784 struct config_group scsi_tgt_dev_group; 785 struct config_group scsi_lu_group; 786 }; 787 788 struct se_cmd_queue { 789 struct llist_head cmd_list; 790 struct work_struct work; 791 }; 792 793 struct se_dev_plug { 794 struct se_device *se_dev; 795 }; 796 797 struct se_device_queue { 798 struct list_head state_list; 799 spinlock_t lock; 800 struct se_cmd_queue sq; 801 }; 802 803 struct se_device { 804 /* Used for SAM Task Attribute ordering */ 805 u32 dev_cur_ordered_id; 806 u32 dev_flags; 807 #define DF_CONFIGURED 0x00000001 808 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 809 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 810 #define DF_USING_UDEV_PATH 0x00000008 811 #define DF_USING_ALIAS 0x00000010 812 #define DF_READ_ONLY 0x00000020 813 u8 transport_flags; 814 /* Physical device queue depth */ 815 u32 queue_depth; 816 /* Used for SPC-2 reservations enforce of ISIDs */ 817 u64 dev_res_bin_isid; 818 /* Pointer to transport specific device structure */ 819 u32 dev_index; 820 u64 creation_time; 821 atomic_long_t num_resets; 822 atomic_long_t aborts_complete; 823 atomic_long_t aborts_no_task; 824 atomic_long_t num_cmds; 825 atomic_long_t read_bytes; 826 atomic_long_t write_bytes; 827 /* Active commands on this virtual SE device */ 828 atomic_t non_ordered; 829 bool ordered_sync_in_progress; 830 atomic_t delayed_cmd_count; 831 atomic_t dev_qf_count; 832 u32 export_count; 833 spinlock_t delayed_cmd_lock; 834 spinlock_t dev_reservation_lock; 835 unsigned int dev_reservation_flags; 836 #define DRF_SPC2_RESERVATIONS 0x00000001 837 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 838 spinlock_t se_port_lock; 839 spinlock_t se_tmr_lock; 840 spinlock_t qf_cmd_lock; 841 struct semaphore caw_sem; 842 /* Used for legacy SPC-2 reservations */ 843 struct se_session *reservation_holder; 844 /* Used for ALUA Logical Unit Group membership */ 845 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 846 /* Used for SPC-3 Persistent Reservations */ 847 struct t10_pr_registration *dev_pr_res_holder; 848 struct list_head dev_sep_list; 849 struct list_head dev_tmr_list; 850 struct work_struct qf_work_queue; 851 struct work_struct delayed_cmd_work; 852 struct list_head delayed_cmd_list; 853 struct list_head qf_cmd_list; 854 /* Pointer to associated SE HBA */ 855 struct se_hba *se_hba; 856 /* T10 Inquiry and VPD WWN Information */ 857 struct t10_wwn t10_wwn; 858 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 859 struct t10_alua t10_alua; 860 /* T10 SPC-2 + SPC-3 Reservations */ 861 struct t10_reservation t10_pr; 862 struct se_dev_attrib dev_attrib; 863 struct config_group dev_action_group; 864 struct config_group dev_group; 865 struct config_group dev_pr_group; 866 struct se_dev_stat_grps dev_stat_grps; 867 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 868 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 869 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 870 unsigned char udev_path[SE_UDEV_PATH_LEN]; 871 /* Pointer to template of function pointers for transport */ 872 const struct target_backend_ops *transport; 873 struct se_lun xcopy_lun; 874 /* Protection Information */ 875 int prot_length; 876 /* For se_lun->lun_se_dev RCU read-side critical access */ 877 u32 hba_index; 878 struct rcu_head rcu_head; 879 int queue_cnt; 880 struct se_device_queue *queues; 881 struct mutex lun_reset_mutex; 882 }; 883 884 struct target_opcode_descriptor { 885 u8 support:3; 886 u8 serv_action_valid:1; 887 u8 opcode; 888 u16 service_action; 889 u32 cdb_size; 890 u8 specific_timeout; 891 u16 nominal_timeout; 892 u16 recommended_timeout; 893 bool (*enabled)(struct target_opcode_descriptor *descr, 894 struct se_cmd *cmd); 895 void (*update_usage_bits)(u8 *usage_bits, 896 struct se_device *dev); 897 u8 usage_bits[]; 898 }; 899 900 struct se_hba { 901 u16 hba_tpgt; 902 u32 hba_id; 903 /* See hba_flags_table */ 904 u32 hba_flags; 905 /* Virtual iSCSI devices attached. */ 906 u32 dev_count; 907 u32 hba_index; 908 /* Pointer to transport specific host structure. */ 909 void *hba_ptr; 910 struct list_head hba_node; 911 spinlock_t device_lock; 912 struct config_group hba_group; 913 struct mutex hba_access_mutex; 914 struct target_backend *backend; 915 }; 916 917 struct se_tpg_np { 918 struct se_portal_group *tpg_np_parent; 919 struct config_group tpg_np_group; 920 }; 921 to_tpg_np(struct config_item * item)922 static inline struct se_tpg_np *to_tpg_np(struct config_item *item) 923 { 924 return container_of(to_config_group(item), struct se_tpg_np, 925 tpg_np_group); 926 } 927 928 struct se_portal_group { 929 /* 930 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1. 931 * 932 * Negative values can be used by fabric drivers for internal use TPGs. 933 */ 934 int proto_id; 935 bool enabled; 936 /* RELATIVE TARGET PORT IDENTIFIER */ 937 u16 tpg_rtpi; 938 bool rtpi_manual; 939 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 940 atomic_t tpg_pr_ref_count; 941 /* Spinlock for adding/removing ACLed Nodes */ 942 struct mutex acl_node_mutex; 943 /* Spinlock for adding/removing sessions */ 944 spinlock_t session_lock; 945 struct mutex tpg_lun_mutex; 946 /* linked list for initiator ACL list */ 947 struct list_head acl_node_list; 948 struct hlist_head tpg_lun_hlist; 949 struct se_lun *tpg_virt_lun0; 950 /* List of TCM sessions associated wth this TPG */ 951 struct list_head tpg_sess_list; 952 /* Pointer to $FABRIC_MOD dependent code */ 953 const struct target_core_fabric_ops *se_tpg_tfo; 954 struct se_wwn *se_tpg_wwn; 955 struct config_group tpg_group; 956 struct config_group tpg_lun_group; 957 struct config_group tpg_np_group; 958 struct config_group tpg_acl_group; 959 struct config_group tpg_attrib_group; 960 struct config_group tpg_auth_group; 961 struct config_group tpg_param_group; 962 }; 963 to_tpg(struct config_item * item)964 static inline struct se_portal_group *to_tpg(struct config_item *item) 965 { 966 return container_of(to_config_group(item), struct se_portal_group, 967 tpg_group); 968 } 969 attrib_to_tpg(struct config_item * item)970 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item) 971 { 972 return container_of(to_config_group(item), struct se_portal_group, 973 tpg_attrib_group); 974 } 975 auth_to_tpg(struct config_item * item)976 static inline struct se_portal_group *auth_to_tpg(struct config_item *item) 977 { 978 return container_of(to_config_group(item), struct se_portal_group, 979 tpg_auth_group); 980 } 981 param_to_tpg(struct config_item * item)982 static inline struct se_portal_group *param_to_tpg(struct config_item *item) 983 { 984 return container_of(to_config_group(item), struct se_portal_group, 985 tpg_param_group); 986 } 987 988 enum { 989 /* Use se_cmd's cpuid for completion */ 990 SE_COMPL_AFFINITY_CPUID = -1, 991 /* Complete on current CPU */ 992 SE_COMPL_AFFINITY_CURR_CPU = -2, 993 }; 994 995 struct se_wwn { 996 struct target_fabric_configfs *wwn_tf; 997 void *priv; 998 struct config_group wwn_group; 999 struct config_group fabric_stat_group; 1000 struct config_group param_group; 1001 int cmd_compl_affinity; 1002 }; 1003 atomic_inc_mb(atomic_t * v)1004 static inline void atomic_inc_mb(atomic_t *v) 1005 { 1006 smp_mb__before_atomic(); 1007 atomic_inc(v); 1008 smp_mb__after_atomic(); 1009 } 1010 atomic_dec_mb(atomic_t * v)1011 static inline void atomic_dec_mb(atomic_t *v) 1012 { 1013 smp_mb__before_atomic(); 1014 atomic_dec(v); 1015 smp_mb__after_atomic(); 1016 } 1017 target_free_tag(struct se_session * sess,struct se_cmd * cmd)1018 static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd) 1019 { 1020 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu); 1021 } 1022 1023 #endif /* TARGET_CORE_BASE_H */ 1024