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 <linux/t10-pi.h> 10 #include <net/sock.h> 11 #include <net/tcp.h> 12 13 #define TARGET_CORE_VERSION "v5.0" 14 15 /* 16 * Maximum size of a CDB that can be stored in se_cmd without allocating 17 * memory dynamically for the CDB. 18 */ 19 #define TCM_MAX_COMMAND_SIZE 32 20 /* 21 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently 22 * defined 96, but the real limit is 252 (or 260 including the header) 23 */ 24 #define TRANSPORT_SENSE_BUFFER 96 25 /* Used by transport_send_check_condition_and_sense() */ 26 #define SPC_SENSE_KEY_OFFSET 2 27 #define SPC_ADD_SENSE_LEN_OFFSET 7 28 #define SPC_DESC_TYPE_OFFSET 8 29 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9 30 #define SPC_VALIDITY_OFFSET 10 31 #define SPC_ASC_KEY_OFFSET 12 32 #define SPC_ASCQ_KEY_OFFSET 13 33 #define TRANSPORT_IQN_LEN 224 34 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ 35 #define LU_GROUP_NAME_BUF 256 36 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ 37 #define TG_PT_GROUP_NAME_BUF 256 38 /* Used to parse VPD into struct t10_vpd */ 39 #define VPD_TMP_BUF_SIZE 254 40 /* Used by transport_generic_cmd_sequencer() */ 41 #define READ_BLOCK_LEN 6 42 #define READ_CAP_LEN 8 43 #define READ_POSITION_LEN 20 44 #define INQUIRY_LEN 36 45 /* Used by transport_get_inquiry_vpd_serial() */ 46 #define INQUIRY_VPD_SERIAL_LEN 254 47 /* Used by transport_get_inquiry_vpd_device_ident() */ 48 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 49 50 /* Attempts before moving from SHORT to LONG */ 51 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ 53 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ 54 55 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ 56 57 /* struct se_dev_attrib sanity values */ 58 /* Default max_unmap_lba_count */ 59 #define DA_MAX_UNMAP_LBA_COUNT 0 60 /* Default max_unmap_block_desc_count */ 61 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 62 /* Default unmap_granularity */ 63 #define DA_UNMAP_GRANULARITY_DEFAULT 0 64 /* Default unmap_granularity_alignment */ 65 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 66 /* Default unmap_zeroes_data */ 67 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0 68 /* Default max_write_same_len, disabled by default */ 69 #define DA_MAX_WRITE_SAME_LEN 0 70 /* Use a model alias based on the configfs backend device name */ 71 #define DA_EMULATE_MODEL_ALIAS 0 72 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 73 #define DA_EMULATE_WRITE_CACHE 0 74 /* Emulation for UNIT ATTENTION Interlock Control */ 75 #define DA_EMULATE_UA_INTLLCK_CTRL 0 76 /* Emulation for TASK_ABORTED status (TAS) by default */ 77 #define DA_EMULATE_TAS 1 78 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 79 #define DA_EMULATE_TPU 0 80 /* 81 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 82 * block/blk-lib.c:blkdev_issue_discard() 83 */ 84 #define DA_EMULATE_TPWS 0 85 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */ 86 #define DA_EMULATE_CAW 1 87 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */ 88 #define DA_EMULATE_3PC 1 89 /* No Emulation for PSCSI by default */ 90 #define DA_EMULATE_ALUA 0 91 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 92 #define DA_ENFORCE_PR_ISIDS 1 93 /* Force SPC-3 PR Activate Persistence across Target Power Loss */ 94 #define DA_FORCE_PR_APTPL 0 95 #define DA_STATUS_MAX_SECTORS_MIN 16 96 #define DA_STATUS_MAX_SECTORS_MAX 8192 97 /* By default don't report non-rotating (solid state) medium */ 98 #define DA_IS_NONROT 0 99 /* Queue Algorithm Modifier default for restricted reordering in control mode page */ 100 #define DA_EMULATE_REST_REORD 0 101 102 #define SE_INQUIRY_BUF 1024 103 #define SE_MODE_PAGE_BUF 512 104 #define SE_SENSE_BUF 96 105 106 /* struct se_hba->hba_flags */ 107 enum hba_flags_table { 108 HBA_FLAGS_INTERNAL_USE = 0x01, 109 HBA_FLAGS_PSCSI_MODE = 0x02, 110 }; 111 112 /* Special transport agnostic struct se_cmd->t_states */ 113 enum transport_state_table { 114 TRANSPORT_NO_STATE = 0, 115 TRANSPORT_NEW_CMD = 1, 116 TRANSPORT_WRITE_PENDING = 3, 117 TRANSPORT_PROCESSING = 5, 118 TRANSPORT_COMPLETE = 6, 119 TRANSPORT_ISTATE_PROCESSING = 11, 120 TRANSPORT_COMPLETE_QF_WP = 18, 121 TRANSPORT_COMPLETE_QF_OK = 19, 122 }; 123 124 /* Used for struct se_cmd->se_cmd_flags */ 125 enum se_cmd_flags_table { 126 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 127 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 128 SCF_EMULATED_TASK_SENSE = 0x00000004, 129 SCF_SCSI_DATA_CDB = 0x00000008, 130 SCF_SCSI_TMR_CDB = 0x00000010, 131 SCF_FUA = 0x00000080, 132 SCF_SE_LUN_CMD = 0x00000100, 133 SCF_BIDI = 0x00000400, 134 SCF_SENT_CHECK_CONDITION = 0x00000800, 135 SCF_OVERFLOW_BIT = 0x00001000, 136 SCF_UNDERFLOW_BIT = 0x00002000, 137 SCF_SEND_DELAYED_TAS = 0x00004000, 138 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 139 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 140 SCF_COMPARE_AND_WRITE = 0x00080000, 141 SCF_COMPARE_AND_WRITE_POST = 0x00100000, 142 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000, 143 SCF_ACK_KREF = 0x00400000, 144 SCF_USE_CPUID = 0x00800000, 145 }; 146 147 /* 148 * Used by transport_send_check_condition_and_sense() 149 * to signal which ASC/ASCQ sense payload should be built. 150 */ 151 typedef unsigned __bitwise__ sense_reason_t; 152 153 enum tcm_sense_reason_table { 154 #define R(x) (__force sense_reason_t )(x) 155 TCM_NO_SENSE = R(0x00), 156 TCM_NON_EXISTENT_LUN = R(0x01), 157 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 158 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 159 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 160 TCM_SERVICE_CRC_ERROR = R(0x05), 161 TCM_SNACK_REJECTED = R(0x06), 162 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 163 TCM_INVALID_CDB_FIELD = R(0x08), 164 TCM_INVALID_PARAMETER_LIST = R(0x09), 165 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 166 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 167 TCM_WRITE_PROTECTED = R(0x0c), 168 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 169 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 170 TCM_CHECK_CONDITION_NOT_READY = R(0x0f), 171 TCM_RESERVATION_CONFLICT = R(0x10), 172 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 173 TCM_OUT_OF_RESOURCES = R(0x12), 174 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 175 TCM_MISCOMPARE_VERIFY = R(0x14), 176 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 177 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 178 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 179 #undef R 180 }; 181 182 enum target_sc_flags_table { 183 TARGET_SCF_BIDI_OP = 0x01, 184 TARGET_SCF_ACK_KREF = 0x02, 185 TARGET_SCF_UNKNOWN_SIZE = 0x04, 186 TARGET_SCF_USE_CPUID = 0x08, 187 }; 188 189 /* fabric independent task management function values */ 190 enum tcm_tmreq_table { 191 TMR_ABORT_TASK = 1, 192 TMR_ABORT_TASK_SET = 2, 193 TMR_CLEAR_ACA = 3, 194 TMR_CLEAR_TASK_SET = 4, 195 TMR_LUN_RESET = 5, 196 TMR_TARGET_WARM_RESET = 6, 197 TMR_TARGET_COLD_RESET = 7, 198 }; 199 200 /* fabric independent task management response values */ 201 enum tcm_tmrsp_table { 202 TMR_FUNCTION_FAILED = 0, 203 TMR_FUNCTION_COMPLETE = 1, 204 TMR_TASK_DOES_NOT_EXIST = 2, 205 TMR_LUN_DOES_NOT_EXIST = 3, 206 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, 207 TMR_FUNCTION_REJECTED = 5, 208 }; 209 210 /* 211 * Used for target SCSI statistics 212 */ 213 typedef enum { 214 SCSI_INST_INDEX, 215 SCSI_DEVICE_INDEX, 216 SCSI_AUTH_INTR_INDEX, 217 SCSI_INDEX_TYPE_MAX 218 } scsi_index_t; 219 220 struct se_cmd; 221 222 struct t10_alua_lba_map_member { 223 struct list_head lba_map_mem_list; 224 int lba_map_mem_alua_state; 225 int lba_map_mem_alua_pg_id; 226 }; 227 228 struct t10_alua_lba_map { 229 u64 lba_map_first_lba; 230 u64 lba_map_last_lba; 231 struct list_head lba_map_list; 232 struct list_head lba_map_mem_list; 233 }; 234 235 struct t10_alua { 236 /* ALUA Target Port Group ID */ 237 u16 alua_tg_pt_gps_counter; 238 u32 alua_tg_pt_gps_count; 239 /* Referrals support */ 240 spinlock_t lba_map_lock; 241 u32 lba_map_segment_size; 242 u32 lba_map_segment_multiplier; 243 struct list_head lba_map_list; 244 spinlock_t tg_pt_gps_lock; 245 struct se_device *t10_dev; 246 /* Used for default ALUA Target Port Group */ 247 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 248 /* Used for default ALUA Target Port Group ConfigFS group */ 249 struct config_group alua_tg_pt_gps_group; 250 struct list_head tg_pt_gps_list; 251 }; 252 253 struct t10_alua_lu_gp { 254 u16 lu_gp_id; 255 int lu_gp_valid_id; 256 u32 lu_gp_members; 257 atomic_t lu_gp_ref_cnt; 258 spinlock_t lu_gp_lock; 259 struct config_group lu_gp_group; 260 struct list_head lu_gp_node; 261 struct list_head lu_gp_mem_list; 262 }; 263 264 struct t10_alua_lu_gp_member { 265 bool lu_gp_assoc; 266 atomic_t lu_gp_mem_ref_cnt; 267 spinlock_t lu_gp_mem_lock; 268 struct t10_alua_lu_gp *lu_gp; 269 struct se_device *lu_gp_mem_dev; 270 struct list_head lu_gp_mem_list; 271 }; 272 273 struct t10_alua_tg_pt_gp { 274 u16 tg_pt_gp_id; 275 int tg_pt_gp_valid_id; 276 int tg_pt_gp_alua_supported_states; 277 int tg_pt_gp_alua_pending_state; 278 int tg_pt_gp_alua_previous_state; 279 int tg_pt_gp_alua_access_status; 280 int tg_pt_gp_alua_access_type; 281 int tg_pt_gp_nonop_delay_msecs; 282 int tg_pt_gp_trans_delay_msecs; 283 int tg_pt_gp_implicit_trans_secs; 284 int tg_pt_gp_pref; 285 int tg_pt_gp_write_metadata; 286 u32 tg_pt_gp_members; 287 atomic_t tg_pt_gp_alua_access_state; 288 atomic_t tg_pt_gp_ref_cnt; 289 spinlock_t tg_pt_gp_lock; 290 struct mutex tg_pt_gp_md_mutex; 291 struct se_device *tg_pt_gp_dev; 292 struct config_group tg_pt_gp_group; 293 struct list_head tg_pt_gp_list; 294 struct list_head tg_pt_gp_lun_list; 295 struct se_lun *tg_pt_gp_alua_lun; 296 struct se_node_acl *tg_pt_gp_alua_nacl; 297 struct delayed_work tg_pt_gp_transition_work; 298 struct completion *tg_pt_gp_transition_complete; 299 }; 300 301 struct t10_vpd { 302 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 303 int protocol_identifier_set; 304 u32 protocol_identifier; 305 u32 device_identifier_code_set; 306 u32 association; 307 u32 device_identifier_type; 308 struct list_head vpd_list; 309 }; 310 311 struct t10_wwn { 312 char vendor[8]; 313 char model[16]; 314 char revision[4]; 315 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 316 spinlock_t t10_vpd_lock; 317 struct se_device *t10_dev; 318 struct config_group t10_wwn_group; 319 struct list_head t10_vpd_list; 320 }; 321 322 struct t10_pr_registration { 323 /* Used for fabrics that contain WWN+ISID */ 324 #define PR_REG_ISID_LEN 16 325 /* PR_REG_ISID_LEN + ',i,0x' */ 326 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 327 char pr_reg_isid[PR_REG_ISID_LEN]; 328 /* Used during APTPL metadata reading */ 329 #define PR_APTPL_MAX_IPORT_LEN 256 330 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 331 /* Used during APTPL metadata reading */ 332 #define PR_APTPL_MAX_TPORT_LEN 256 333 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 334 u16 pr_aptpl_rpti; 335 u16 pr_reg_tpgt; 336 /* Reservation effects all target ports */ 337 int pr_reg_all_tg_pt; 338 /* Activate Persistence across Target Power Loss */ 339 int pr_reg_aptpl; 340 int pr_res_holder; 341 int pr_res_type; 342 int pr_res_scope; 343 /* Used for fabric initiator WWPNs using a ISID */ 344 bool isid_present_at_reg; 345 u64 pr_res_mapped_lun; 346 u64 pr_aptpl_target_lun; 347 u16 tg_pt_sep_rtpi; 348 u32 pr_res_generation; 349 u64 pr_reg_bin_isid; 350 u64 pr_res_key; 351 atomic_t pr_res_holders; 352 struct se_node_acl *pr_reg_nacl; 353 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */ 354 struct se_dev_entry *pr_reg_deve; 355 struct list_head pr_reg_list; 356 struct list_head pr_reg_abort_list; 357 struct list_head pr_reg_aptpl_list; 358 struct list_head pr_reg_atp_list; 359 struct list_head pr_reg_atp_mem_list; 360 }; 361 362 struct t10_reservation { 363 /* Reservation effects all target ports */ 364 int pr_all_tg_pt; 365 /* Activate Persistence across Target Power Loss enabled 366 * for SCSI device */ 367 int pr_aptpl_active; 368 #define PR_APTPL_BUF_LEN 262144 369 u32 pr_generation; 370 spinlock_t registration_lock; 371 spinlock_t aptpl_reg_lock; 372 /* 373 * This will always be set by one individual I_T Nexus. 374 * However with all_tg_pt=1, other I_T Nexus from the 375 * same initiator can access PR reg/res info on a different 376 * target port. 377 * 378 * There is also the 'All Registrants' case, where there is 379 * a single *pr_res_holder of the reservation, but all 380 * registrations are considered reservation holders. 381 */ 382 struct se_node_acl *pr_res_holder; 383 struct list_head registration_list; 384 struct list_head aptpl_reg_list; 385 }; 386 387 struct se_tmr_req { 388 /* Task Management function to be performed */ 389 u8 function; 390 /* Task Management response to send */ 391 u8 response; 392 int call_transport; 393 /* Reference to ITT that Task Mgmt should be performed */ 394 u64 ref_task_tag; 395 void *fabric_tmr_ptr; 396 struct se_cmd *task_cmd; 397 struct se_device *tmr_dev; 398 struct se_lun *tmr_lun; 399 struct list_head tmr_list; 400 }; 401 402 enum target_prot_op { 403 TARGET_PROT_NORMAL = 0, 404 TARGET_PROT_DIN_INSERT = (1 << 0), 405 TARGET_PROT_DOUT_INSERT = (1 << 1), 406 TARGET_PROT_DIN_STRIP = (1 << 2), 407 TARGET_PROT_DOUT_STRIP = (1 << 3), 408 TARGET_PROT_DIN_PASS = (1 << 4), 409 TARGET_PROT_DOUT_PASS = (1 << 5), 410 }; 411 412 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \ 413 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \ 414 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS 415 416 enum target_prot_type { 417 TARGET_DIF_TYPE0_PROT, 418 TARGET_DIF_TYPE1_PROT, 419 TARGET_DIF_TYPE2_PROT, 420 TARGET_DIF_TYPE3_PROT, 421 }; 422 423 enum target_core_dif_check { 424 TARGET_DIF_CHECK_GUARD = 0x1 << 0, 425 TARGET_DIF_CHECK_APPTAG = 0x1 << 1, 426 TARGET_DIF_CHECK_REFTAG = 0x1 << 2, 427 }; 428 429 /* for sam_task_attr */ 430 #define TCM_SIMPLE_TAG 0x20 431 #define TCM_HEAD_TAG 0x21 432 #define TCM_ORDERED_TAG 0x22 433 #define TCM_ACA_TAG 0x24 434 435 struct se_cmd { 436 /* SAM response code being sent to initiator */ 437 u8 scsi_status; 438 u8 scsi_asc; 439 u8 scsi_ascq; 440 u16 scsi_sense_length; 441 unsigned cmd_wait_set:1; 442 unsigned unknown_data_length:1; 443 bool state_active:1; 444 u64 tag; /* SAM command identifier aka task tag */ 445 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 446 int alua_nonop_delay; 447 /* See include/linux/dma-mapping.h */ 448 enum dma_data_direction data_direction; 449 /* For SAM Task Attribute */ 450 int sam_task_attr; 451 /* Used for se_sess->sess_tag_pool */ 452 unsigned int map_tag; 453 /* Transport protocol dependent state, see transport_state_table */ 454 enum transport_state_table t_state; 455 /* See se_cmd_flags_table */ 456 u32 se_cmd_flags; 457 /* Total size in bytes associated with command */ 458 u32 data_length; 459 u32 residual_count; 460 u64 orig_fe_lun; 461 /* Persistent Reservation key */ 462 u64 pr_res_key; 463 /* Used for sense data */ 464 void *sense_buffer; 465 struct list_head se_delayed_node; 466 struct list_head se_qf_node; 467 struct se_device *se_dev; 468 struct se_lun *se_lun; 469 /* Only used for internal passthrough and legacy TCM fabric modules */ 470 struct se_session *se_sess; 471 struct se_tmr_req *se_tmr_req; 472 struct list_head se_cmd_list; 473 struct completion cmd_wait_comp; 474 const struct target_core_fabric_ops *se_tfo; 475 sense_reason_t (*execute_cmd)(struct se_cmd *); 476 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *); 477 void *protocol_data; 478 479 unsigned char *t_task_cdb; 480 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 481 unsigned long long t_task_lba; 482 unsigned int t_task_nolb; 483 unsigned int transport_state; 484 #define CMD_T_ABORTED (1 << 0) 485 #define CMD_T_ACTIVE (1 << 1) 486 #define CMD_T_COMPLETE (1 << 2) 487 #define CMD_T_SENT (1 << 4) 488 #define CMD_T_STOP (1 << 5) 489 #define CMD_T_DEV_ACTIVE (1 << 7) 490 #define CMD_T_BUSY (1 << 9) 491 #define CMD_T_TAS (1 << 10) 492 #define CMD_T_FABRIC_STOP (1 << 11) 493 spinlock_t t_state_lock; 494 struct kref cmd_kref; 495 struct completion t_transport_stop_comp; 496 497 struct work_struct work; 498 499 struct scatterlist *t_data_sg; 500 struct scatterlist *t_data_sg_orig; 501 unsigned int t_data_nents; 502 unsigned int t_data_nents_orig; 503 void *t_data_vmap; 504 struct scatterlist *t_bidi_data_sg; 505 unsigned int t_bidi_data_nents; 506 507 /* Used for lun->lun_ref counting */ 508 int lun_ref_active; 509 510 struct list_head state_list; 511 512 /* backend private data */ 513 void *priv; 514 515 /* DIF related members */ 516 enum target_prot_op prot_op; 517 enum target_prot_type prot_type; 518 u8 prot_checks; 519 bool prot_pto; 520 u32 prot_length; 521 u32 reftag_seed; 522 struct scatterlist *t_prot_sg; 523 unsigned int t_prot_nents; 524 sense_reason_t pi_err; 525 sector_t bad_sector; 526 int cpuid; 527 }; 528 529 struct se_ua { 530 u8 ua_asc; 531 u8 ua_ascq; 532 struct list_head ua_nacl_list; 533 }; 534 535 struct se_node_acl { 536 char initiatorname[TRANSPORT_IQN_LEN]; 537 /* Used to signal demo mode created ACL, disabled by default */ 538 bool dynamic_node_acl; 539 u32 queue_depth; 540 u32 acl_index; 541 enum target_prot_type saved_prot_type; 542 #define MAX_ACL_TAG_SIZE 64 543 char acl_tag[MAX_ACL_TAG_SIZE]; 544 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 545 atomic_t acl_pr_ref_count; 546 struct hlist_head lun_entry_hlist; 547 struct se_session *nacl_sess; 548 struct se_portal_group *se_tpg; 549 struct mutex lun_entry_mutex; 550 spinlock_t nacl_sess_lock; 551 struct config_group acl_group; 552 struct config_group acl_attrib_group; 553 struct config_group acl_auth_group; 554 struct config_group acl_param_group; 555 struct config_group acl_fabric_stat_group; 556 struct list_head acl_list; 557 struct list_head acl_sess_list; 558 struct completion acl_free_comp; 559 struct kref acl_kref; 560 }; 561 562 static inline struct se_node_acl *acl_to_nacl(struct config_item *item) 563 { 564 return container_of(to_config_group(item), struct se_node_acl, 565 acl_group); 566 } 567 568 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item) 569 { 570 return container_of(to_config_group(item), struct se_node_acl, 571 acl_attrib_group); 572 } 573 574 static inline struct se_node_acl *auth_to_nacl(struct config_item *item) 575 { 576 return container_of(to_config_group(item), struct se_node_acl, 577 acl_auth_group); 578 } 579 580 static inline struct se_node_acl *param_to_nacl(struct config_item *item) 581 { 582 return container_of(to_config_group(item), struct se_node_acl, 583 acl_param_group); 584 } 585 586 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item) 587 { 588 return container_of(to_config_group(item), struct se_node_acl, 589 acl_fabric_stat_group); 590 } 591 592 struct se_session { 593 unsigned sess_tearing_down:1; 594 u64 sess_bin_isid; 595 enum target_prot_op sup_prot_ops; 596 enum target_prot_type sess_prot_type; 597 struct se_node_acl *se_node_acl; 598 struct se_portal_group *se_tpg; 599 void *fabric_sess_ptr; 600 struct list_head sess_list; 601 struct list_head sess_acl_list; 602 struct list_head sess_cmd_list; 603 struct list_head sess_wait_list; 604 spinlock_t sess_cmd_lock; 605 void *sess_cmd_map; 606 struct percpu_ida sess_tag_pool; 607 }; 608 609 struct se_device; 610 struct se_transform_info; 611 struct scatterlist; 612 613 struct se_ml_stat_grps { 614 struct config_group stat_group; 615 struct config_group scsi_auth_intr_group; 616 struct config_group scsi_att_intr_port_group; 617 }; 618 619 struct se_lun_acl { 620 u64 mapped_lun; 621 struct se_node_acl *se_lun_nacl; 622 struct se_lun *se_lun; 623 struct config_group se_lun_group; 624 struct se_ml_stat_grps ml_stat_grps; 625 }; 626 627 struct se_dev_entry { 628 u64 mapped_lun; 629 u64 pr_res_key; 630 u64 creation_time; 631 bool lun_access_ro; 632 u32 attach_count; 633 atomic_long_t total_cmds; 634 atomic_long_t read_bytes; 635 atomic_long_t write_bytes; 636 atomic_t ua_count; 637 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 638 struct kref pr_kref; 639 struct completion pr_comp; 640 struct se_lun_acl __rcu *se_lun_acl; 641 spinlock_t ua_lock; 642 struct se_lun __rcu *se_lun; 643 #define DEF_PR_REG_ACTIVE 1 644 unsigned long deve_flags; 645 struct list_head alua_port_list; 646 struct list_head lun_link; 647 struct list_head ua_list; 648 struct hlist_node link; 649 struct rcu_head rcu_head; 650 }; 651 652 struct se_dev_attrib { 653 int emulate_model_alias; 654 int emulate_dpo; 655 int emulate_fua_write; 656 int emulate_fua_read; 657 int emulate_write_cache; 658 int emulate_ua_intlck_ctrl; 659 int emulate_tas; 660 int emulate_tpu; 661 int emulate_tpws; 662 int emulate_caw; 663 int emulate_3pc; 664 int pi_prot_format; 665 enum target_prot_type pi_prot_type; 666 enum target_prot_type hw_pi_prot_type; 667 int enforce_pr_isids; 668 int force_pr_aptpl; 669 int is_nonrot; 670 int emulate_rest_reord; 671 int unmap_zeroes_data; 672 u32 hw_block_size; 673 u32 block_size; 674 u32 hw_max_sectors; 675 u32 optimal_sectors; 676 u32 hw_queue_depth; 677 u32 queue_depth; 678 u32 max_unmap_lba_count; 679 u32 max_unmap_block_desc_count; 680 u32 unmap_granularity; 681 u32 unmap_granularity_alignment; 682 u32 max_write_same_len; 683 u32 max_bytes_per_io; 684 struct se_device *da_dev; 685 struct config_group da_group; 686 }; 687 688 struct se_port_stat_grps { 689 struct config_group stat_group; 690 struct config_group scsi_port_group; 691 struct config_group scsi_tgt_port_group; 692 struct config_group scsi_transport_group; 693 }; 694 695 struct scsi_port_stats { 696 atomic_long_t cmd_pdus; 697 atomic_long_t tx_data_octets; 698 atomic_long_t rx_data_octets; 699 }; 700 701 struct se_lun { 702 u64 unpacked_lun; 703 #define SE_LUN_LINK_MAGIC 0xffff7771 704 u32 lun_link_magic; 705 bool lun_access_ro; 706 u32 lun_index; 707 708 /* RELATIVE TARGET PORT IDENTIFER */ 709 u16 lun_rtpi; 710 atomic_t lun_acl_count; 711 struct se_device __rcu *lun_se_dev; 712 713 struct list_head lun_deve_list; 714 spinlock_t lun_deve_lock; 715 716 /* ALUA state */ 717 int lun_tg_pt_secondary_stat; 718 int lun_tg_pt_secondary_write_md; 719 atomic_t lun_tg_pt_secondary_offline; 720 struct mutex lun_tg_pt_md_mutex; 721 722 /* ALUA target port group linkage */ 723 struct list_head lun_tg_pt_gp_link; 724 struct t10_alua_tg_pt_gp *lun_tg_pt_gp; 725 spinlock_t lun_tg_pt_gp_lock; 726 727 struct se_portal_group *lun_tpg; 728 struct scsi_port_stats lun_stats; 729 struct config_group lun_group; 730 struct se_port_stat_grps port_stat_grps; 731 struct completion lun_ref_comp; 732 struct percpu_ref lun_ref; 733 struct list_head lun_dev_link; 734 struct hlist_node link; 735 struct rcu_head rcu_head; 736 }; 737 738 struct se_dev_stat_grps { 739 struct config_group stat_group; 740 struct config_group scsi_dev_group; 741 struct config_group scsi_tgt_dev_group; 742 struct config_group scsi_lu_group; 743 }; 744 745 struct se_device { 746 #define SE_DEV_LINK_MAGIC 0xfeeddeef 747 u32 dev_link_magic; 748 /* RELATIVE TARGET PORT IDENTIFER Counter */ 749 u16 dev_rpti_counter; 750 /* Used for SAM Task Attribute ordering */ 751 u32 dev_cur_ordered_id; 752 u32 dev_flags; 753 #define DF_CONFIGURED 0x00000001 754 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 755 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 756 #define DF_USING_UDEV_PATH 0x00000008 757 #define DF_USING_ALIAS 0x00000010 758 #define DF_READ_ONLY 0x00000020 759 /* Physical device queue depth */ 760 u32 queue_depth; 761 /* Used for SPC-2 reservations enforce of ISIDs */ 762 u64 dev_res_bin_isid; 763 /* Pointer to transport specific device structure */ 764 u32 dev_index; 765 u64 creation_time; 766 atomic_long_t num_resets; 767 atomic_long_t num_cmds; 768 atomic_long_t read_bytes; 769 atomic_long_t write_bytes; 770 /* Active commands on this virtual SE device */ 771 atomic_t simple_cmds; 772 atomic_t dev_ordered_sync; 773 atomic_t dev_qf_count; 774 u32 export_count; 775 spinlock_t delayed_cmd_lock; 776 spinlock_t execute_task_lock; 777 spinlock_t dev_reservation_lock; 778 unsigned int dev_reservation_flags; 779 #define DRF_SPC2_RESERVATIONS 0x00000001 780 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 781 spinlock_t se_port_lock; 782 spinlock_t se_tmr_lock; 783 spinlock_t qf_cmd_lock; 784 struct semaphore caw_sem; 785 /* Used for legacy SPC-2 reservationsa */ 786 struct se_node_acl *dev_reserved_node_acl; 787 /* Used for ALUA Logical Unit Group membership */ 788 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 789 /* Used for SPC-3 Persistent Reservations */ 790 struct t10_pr_registration *dev_pr_res_holder; 791 struct list_head dev_sep_list; 792 struct list_head dev_tmr_list; 793 struct workqueue_struct *tmr_wq; 794 struct work_struct qf_work_queue; 795 struct list_head delayed_cmd_list; 796 struct list_head state_list; 797 struct list_head qf_cmd_list; 798 struct list_head g_dev_node; 799 /* Pointer to associated SE HBA */ 800 struct se_hba *se_hba; 801 /* T10 Inquiry and VPD WWN Information */ 802 struct t10_wwn t10_wwn; 803 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 804 struct t10_alua t10_alua; 805 /* T10 SPC-2 + SPC-3 Reservations */ 806 struct t10_reservation t10_pr; 807 struct se_dev_attrib dev_attrib; 808 struct config_group dev_group; 809 struct config_group dev_pr_group; 810 struct se_dev_stat_grps dev_stat_grps; 811 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 812 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 813 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 814 unsigned char udev_path[SE_UDEV_PATH_LEN]; 815 /* Pointer to template of function pointers for transport */ 816 const struct target_backend_ops *transport; 817 /* Linked list for struct se_hba struct se_device list */ 818 struct list_head dev_list; 819 struct se_lun xcopy_lun; 820 /* Protection Information */ 821 int prot_length; 822 /* For se_lun->lun_se_dev RCU read-side critical access */ 823 u32 hba_index; 824 struct rcu_head rcu_head; 825 }; 826 827 struct se_hba { 828 u16 hba_tpgt; 829 u32 hba_id; 830 /* See hba_flags_table */ 831 u32 hba_flags; 832 /* Virtual iSCSI devices attached. */ 833 u32 dev_count; 834 u32 hba_index; 835 /* Pointer to transport specific host structure. */ 836 void *hba_ptr; 837 struct list_head hba_node; 838 spinlock_t device_lock; 839 struct config_group hba_group; 840 struct mutex hba_access_mutex; 841 struct target_backend *backend; 842 }; 843 844 struct se_tpg_np { 845 struct se_portal_group *tpg_np_parent; 846 struct config_group tpg_np_group; 847 }; 848 849 static inline struct se_tpg_np *to_tpg_np(struct config_item *item) 850 { 851 return container_of(to_config_group(item), struct se_tpg_np, 852 tpg_np_group); 853 } 854 855 struct se_portal_group { 856 /* 857 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1. 858 * 859 * Negative values can be used by fabric drivers for internal use TPGs. 860 */ 861 int proto_id; 862 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 863 atomic_t tpg_pr_ref_count; 864 /* Spinlock for adding/removing ACLed Nodes */ 865 struct mutex acl_node_mutex; 866 /* Spinlock for adding/removing sessions */ 867 spinlock_t session_lock; 868 struct mutex tpg_lun_mutex; 869 struct list_head se_tpg_node; 870 /* linked list for initiator ACL list */ 871 struct list_head acl_node_list; 872 struct hlist_head tpg_lun_hlist; 873 struct se_lun *tpg_virt_lun0; 874 /* List of TCM sessions associated wth this TPG */ 875 struct list_head tpg_sess_list; 876 /* Pointer to $FABRIC_MOD dependent code */ 877 const struct target_core_fabric_ops *se_tpg_tfo; 878 struct se_wwn *se_tpg_wwn; 879 struct config_group tpg_group; 880 struct config_group tpg_lun_group; 881 struct config_group tpg_np_group; 882 struct config_group tpg_acl_group; 883 struct config_group tpg_attrib_group; 884 struct config_group tpg_auth_group; 885 struct config_group tpg_param_group; 886 }; 887 888 static inline struct se_portal_group *to_tpg(struct config_item *item) 889 { 890 return container_of(to_config_group(item), struct se_portal_group, 891 tpg_group); 892 } 893 894 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item) 895 { 896 return container_of(to_config_group(item), struct se_portal_group, 897 tpg_attrib_group); 898 } 899 900 static inline struct se_portal_group *auth_to_tpg(struct config_item *item) 901 { 902 return container_of(to_config_group(item), struct se_portal_group, 903 tpg_auth_group); 904 } 905 906 static inline struct se_portal_group *param_to_tpg(struct config_item *item) 907 { 908 return container_of(to_config_group(item), struct se_portal_group, 909 tpg_param_group); 910 } 911 912 struct se_wwn { 913 struct target_fabric_configfs *wwn_tf; 914 struct config_group wwn_group; 915 struct config_group fabric_stat_group; 916 }; 917 918 static inline void atomic_inc_mb(atomic_t *v) 919 { 920 smp_mb__before_atomic(); 921 atomic_inc(v); 922 smp_mb__after_atomic(); 923 } 924 925 static inline void atomic_dec_mb(atomic_t *v) 926 { 927 smp_mb__before_atomic(); 928 atomic_dec(v); 929 smp_mb__after_atomic(); 930 } 931 932 #endif /* TARGET_CORE_BASE_H */ 933