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/* Use a model alias based on the configfs backend device name */ 81#define DA_EMULATE_MODEL_ALIAS 0 82/* Emulation for Direct Page Out */ 83#define DA_EMULATE_DPO 0 84/* Emulation for Forced Unit Access WRITEs */ 85#define DA_EMULATE_FUA_WRITE 1 86/* Emulation for Forced Unit Access READs */ 87#define DA_EMULATE_FUA_READ 0 88/* Emulation for WriteCache and SYNCHRONIZE_CACHE */ 89#define DA_EMULATE_WRITE_CACHE 0 90/* Emulation for UNIT ATTENTION Interlock Control */ 91#define DA_EMULATE_UA_INTLLCK_CTRL 0 92/* Emulation for TASK_ABORTED status (TAS) by default */ 93#define DA_EMULATE_TAS 1 94/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ 95#define DA_EMULATE_TPU 0 96/* 97 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using 98 * block/blk-lib.c:blkdev_issue_discard() 99 */ 100#define DA_EMULATE_TPWS 0 101/* Emulation for CompareAndWrite (AtomicTestandSet) by default */ 102#define DA_EMULATE_CAW 1 103/* Emulation for 3rd Party Copy (ExtendedCopy) by default */ 104#define DA_EMULATE_3PC 1 105/* No Emulation for PSCSI by default */ 106#define DA_EMULATE_ALUA 0 107/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ 108#define DA_ENFORCE_PR_ISIDS 1 109/* Force SPC-3 PR Activate Persistence across Target Power Loss */ 110#define DA_FORCE_PR_APTPL 0 111#define DA_STATUS_MAX_SECTORS_MIN 16 112#define DA_STATUS_MAX_SECTORS_MAX 8192 113/* By default don't report non-rotating (solid state) medium */ 114#define DA_IS_NONROT 0 115/* Queue Algorithm Modifier default for restricted reordering in control mode page */ 116#define DA_EMULATE_REST_REORD 0 117 118#define SE_INQUIRY_BUF 1024 119#define SE_MODE_PAGE_BUF 512 120#define SE_SENSE_BUF 96 121 122/* struct se_hba->hba_flags */ 123enum hba_flags_table { 124 HBA_FLAGS_INTERNAL_USE = 0x01, 125 HBA_FLAGS_PSCSI_MODE = 0x02, 126}; 127 128/* struct se_lun->lun_status */ 129enum transport_lun_status_table { 130 TRANSPORT_LUN_STATUS_FREE = 0, 131 TRANSPORT_LUN_STATUS_ACTIVE = 1, 132}; 133 134/* struct se_portal_group->se_tpg_type */ 135enum transport_tpg_type_table { 136 TRANSPORT_TPG_TYPE_NORMAL = 0, 137 TRANSPORT_TPG_TYPE_DISCOVERY = 1, 138}; 139 140/* Special transport agnostic struct se_cmd->t_states */ 141enum transport_state_table { 142 TRANSPORT_NO_STATE = 0, 143 TRANSPORT_NEW_CMD = 1, 144 TRANSPORT_WRITE_PENDING = 3, 145 TRANSPORT_PROCESSING = 5, 146 TRANSPORT_COMPLETE = 6, 147 TRANSPORT_ISTATE_PROCESSING = 11, 148 TRANSPORT_COMPLETE_QF_WP = 18, 149 TRANSPORT_COMPLETE_QF_OK = 19, 150}; 151 152/* Used for struct se_cmd->se_cmd_flags */ 153enum se_cmd_flags_table { 154 SCF_SUPPORTED_SAM_OPCODE = 0x00000001, 155 SCF_TRANSPORT_TASK_SENSE = 0x00000002, 156 SCF_EMULATED_TASK_SENSE = 0x00000004, 157 SCF_SCSI_DATA_CDB = 0x00000008, 158 SCF_SCSI_TMR_CDB = 0x00000010, 159 SCF_FUA = 0x00000080, 160 SCF_SE_LUN_CMD = 0x00000100, 161 SCF_BIDI = 0x00000400, 162 SCF_SENT_CHECK_CONDITION = 0x00000800, 163 SCF_OVERFLOW_BIT = 0x00001000, 164 SCF_UNDERFLOW_BIT = 0x00002000, 165 SCF_SEND_DELAYED_TAS = 0x00004000, 166 SCF_ALUA_NON_OPTIMIZED = 0x00008000, 167 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000, 168 SCF_COMPARE_AND_WRITE = 0x00080000, 169 SCF_COMPARE_AND_WRITE_POST = 0x00100000, 170 SCF_ACK_KREF = 0x00400000, 171}; 172 173/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */ 174enum transport_lunflags_table { 175 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00, 176 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01, 177 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02, 178 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04, 179}; 180 181/* 182 * Used by transport_send_check_condition_and_sense() 183 * to signal which ASC/ASCQ sense payload should be built. 184 */ 185typedef unsigned __bitwise__ sense_reason_t; 186 187enum tcm_sense_reason_table { 188#define R(x) (__force sense_reason_t )(x) 189 TCM_NO_SENSE = R(0x00), 190 TCM_NON_EXISTENT_LUN = R(0x01), 191 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), 192 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), 193 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), 194 TCM_SERVICE_CRC_ERROR = R(0x05), 195 TCM_SNACK_REJECTED = R(0x06), 196 TCM_SECTOR_COUNT_TOO_MANY = R(0x07), 197 TCM_INVALID_CDB_FIELD = R(0x08), 198 TCM_INVALID_PARAMETER_LIST = R(0x09), 199 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), 200 TCM_UNKNOWN_MODE_PAGE = R(0x0b), 201 TCM_WRITE_PROTECTED = R(0x0c), 202 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), 203 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), 204 TCM_CHECK_CONDITION_NOT_READY = R(0x0f), 205 TCM_RESERVATION_CONFLICT = R(0x10), 206 TCM_ADDRESS_OUT_OF_RANGE = R(0x11), 207 TCM_OUT_OF_RESOURCES = R(0x12), 208 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), 209 TCM_MISCOMPARE_VERIFY = R(0x14), 210 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), 211 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), 212 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), 213#undef R 214}; 215 216enum target_sc_flags_table { 217 TARGET_SCF_BIDI_OP = 0x01, 218 TARGET_SCF_ACK_KREF = 0x02, 219 TARGET_SCF_UNKNOWN_SIZE = 0x04, 220}; 221 222/* fabric independent task management function values */ 223enum tcm_tmreq_table { 224 TMR_ABORT_TASK = 1, 225 TMR_ABORT_TASK_SET = 2, 226 TMR_CLEAR_ACA = 3, 227 TMR_CLEAR_TASK_SET = 4, 228 TMR_LUN_RESET = 5, 229 TMR_TARGET_WARM_RESET = 6, 230 TMR_TARGET_COLD_RESET = 7, 231}; 232 233/* fabric independent task management response values */ 234enum tcm_tmrsp_table { 235 TMR_FUNCTION_FAILED = 0, 236 TMR_FUNCTION_COMPLETE = 1, 237 TMR_TASK_DOES_NOT_EXIST = 2, 238 TMR_LUN_DOES_NOT_EXIST = 3, 239 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, 240 TMR_FUNCTION_REJECTED = 5, 241}; 242 243/* 244 * Used for target SCSI statistics 245 */ 246typedef enum { 247 SCSI_INST_INDEX, 248 SCSI_DEVICE_INDEX, 249 SCSI_AUTH_INTR_INDEX, 250 SCSI_INDEX_TYPE_MAX 251} scsi_index_t; 252 253struct se_cmd; 254 255struct t10_alua_lba_map_member { 256 struct list_head lba_map_mem_list; 257 int lba_map_mem_alua_state; 258 int lba_map_mem_alua_pg_id; 259}; 260 261struct t10_alua_lba_map { 262 u64 lba_map_first_lba; 263 u64 lba_map_last_lba; 264 struct list_head lba_map_list; 265 struct list_head lba_map_mem_list; 266}; 267 268struct t10_alua { 269 /* ALUA Target Port Group ID */ 270 u16 alua_tg_pt_gps_counter; 271 u32 alua_tg_pt_gps_count; 272 /* Referrals support */ 273 spinlock_t lba_map_lock; 274 u32 lba_map_segment_size; 275 u32 lba_map_segment_multiplier; 276 struct list_head lba_map_list; 277 spinlock_t tg_pt_gps_lock; 278 struct se_device *t10_dev; 279 /* Used for default ALUA Target Port Group */ 280 struct t10_alua_tg_pt_gp *default_tg_pt_gp; 281 /* Used for default ALUA Target Port Group ConfigFS group */ 282 struct config_group alua_tg_pt_gps_group; 283 struct list_head tg_pt_gps_list; 284}; 285 286struct t10_alua_lu_gp { 287 u16 lu_gp_id; 288 int lu_gp_valid_id; 289 u32 lu_gp_members; 290 atomic_t lu_gp_ref_cnt; 291 spinlock_t lu_gp_lock; 292 struct config_group lu_gp_group; 293 struct list_head lu_gp_node; 294 struct list_head lu_gp_mem_list; 295}; 296 297struct t10_alua_lu_gp_member { 298 bool lu_gp_assoc; 299 atomic_t lu_gp_mem_ref_cnt; 300 spinlock_t lu_gp_mem_lock; 301 struct t10_alua_lu_gp *lu_gp; 302 struct se_device *lu_gp_mem_dev; 303 struct list_head lu_gp_mem_list; 304}; 305 306struct t10_alua_tg_pt_gp { 307 u16 tg_pt_gp_id; 308 int tg_pt_gp_valid_id; 309 int tg_pt_gp_alua_supported_states; 310 int tg_pt_gp_alua_pending_state; 311 int tg_pt_gp_alua_previous_state; 312 int tg_pt_gp_alua_access_status; 313 int tg_pt_gp_alua_access_type; 314 int tg_pt_gp_nonop_delay_msecs; 315 int tg_pt_gp_trans_delay_msecs; 316 int tg_pt_gp_implicit_trans_secs; 317 int tg_pt_gp_pref; 318 int tg_pt_gp_write_metadata; 319 u32 tg_pt_gp_members; 320 atomic_t tg_pt_gp_alua_access_state; 321 atomic_t tg_pt_gp_ref_cnt; 322 spinlock_t tg_pt_gp_lock; 323 struct mutex tg_pt_gp_md_mutex; 324 struct se_device *tg_pt_gp_dev; 325 struct config_group tg_pt_gp_group; 326 struct list_head tg_pt_gp_list; 327 struct list_head tg_pt_gp_mem_list; 328 struct se_port *tg_pt_gp_alua_port; 329 struct se_node_acl *tg_pt_gp_alua_nacl; 330 struct delayed_work tg_pt_gp_transition_work; 331 struct completion *tg_pt_gp_transition_complete; 332}; 333 334struct t10_alua_tg_pt_gp_member { 335 bool tg_pt_gp_assoc; 336 atomic_t tg_pt_gp_mem_ref_cnt; 337 spinlock_t tg_pt_gp_mem_lock; 338 struct t10_alua_tg_pt_gp *tg_pt_gp; 339 struct se_port *tg_pt; 340 struct list_head tg_pt_gp_mem_list; 341}; 342 343struct t10_vpd { 344 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; 345 int protocol_identifier_set; 346 u32 protocol_identifier; 347 u32 device_identifier_code_set; 348 u32 association; 349 u32 device_identifier_type; 350 struct list_head vpd_list; 351}; 352 353struct t10_wwn { 354 char vendor[8]; 355 char model[16]; 356 char revision[4]; 357 char unit_serial[INQUIRY_VPD_SERIAL_LEN]; 358 spinlock_t t10_vpd_lock; 359 struct se_device *t10_dev; 360 struct config_group t10_wwn_group; 361 struct list_head t10_vpd_list; 362}; 363 364struct t10_pr_registration { 365 /* Used for fabrics that contain WWN+ISID */ 366#define PR_REG_ISID_LEN 16 367 /* PR_REG_ISID_LEN + ',i,0x' */ 368#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) 369 char pr_reg_isid[PR_REG_ISID_LEN]; 370 /* Used during APTPL metadata reading */ 371#define PR_APTPL_MAX_IPORT_LEN 256 372 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; 373 /* Used during APTPL metadata reading */ 374#define PR_APTPL_MAX_TPORT_LEN 256 375 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; 376 u16 pr_aptpl_rpti; 377 u16 pr_reg_tpgt; 378 /* Reservation effects all target ports */ 379 int pr_reg_all_tg_pt; 380 /* Activate Persistence across Target Power Loss */ 381 int pr_reg_aptpl; 382 int pr_res_holder; 383 int pr_res_type; 384 int pr_res_scope; 385 /* Used for fabric initiator WWPNs using a ISID */ 386 bool isid_present_at_reg; 387 u32 pr_res_mapped_lun; 388 u32 pr_aptpl_target_lun; 389 u32 pr_res_generation; 390 u64 pr_reg_bin_isid; 391 u64 pr_res_key; 392 atomic_t pr_res_holders; 393 struct se_node_acl *pr_reg_nacl; 394 struct se_dev_entry *pr_reg_deve; 395 struct se_lun *pr_reg_tg_pt_lun; 396 struct list_head pr_reg_list; 397 struct list_head pr_reg_abort_list; 398 struct list_head pr_reg_aptpl_list; 399 struct list_head pr_reg_atp_list; 400 struct list_head pr_reg_atp_mem_list; 401}; 402 403struct t10_reservation { 404 /* Reservation effects all target ports */ 405 int pr_all_tg_pt; 406 /* Activate Persistence across Target Power Loss enabled 407 * for SCSI device */ 408 int pr_aptpl_active; 409#define PR_APTPL_BUF_LEN 262144 410 u32 pr_generation; 411 spinlock_t registration_lock; 412 spinlock_t aptpl_reg_lock; 413 /* 414 * This will always be set by one individual I_T Nexus. 415 * However with all_tg_pt=1, other I_T Nexus from the 416 * same initiator can access PR reg/res info on a different 417 * target port. 418 * 419 * There is also the 'All Registrants' case, where there is 420 * a single *pr_res_holder of the reservation, but all 421 * registrations are considered reservation holders. 422 */ 423 struct se_node_acl *pr_res_holder; 424 struct list_head registration_list; 425 struct list_head aptpl_reg_list; 426}; 427 428struct se_tmr_req { 429 /* Task Management function to be performed */ 430 u8 function; 431 /* Task Management response to send */ 432 u8 response; 433 int call_transport; 434 /* Reference to ITT that Task Mgmt should be performed */ 435 u32 ref_task_tag; 436 void *fabric_tmr_ptr; 437 struct se_cmd *task_cmd; 438 struct se_device *tmr_dev; 439 struct se_lun *tmr_lun; 440 struct list_head tmr_list; 441}; 442 443enum target_prot_op { 444 TARGET_PROT_NORMAL = 0, 445 TARGET_PROT_DIN_INSERT = (1 << 0), 446 TARGET_PROT_DOUT_INSERT = (1 << 1), 447 TARGET_PROT_DIN_STRIP = (1 << 2), 448 TARGET_PROT_DOUT_STRIP = (1 << 3), 449 TARGET_PROT_DIN_PASS = (1 << 4), 450 TARGET_PROT_DOUT_PASS = (1 << 5), 451}; 452 453#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \ 454 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \ 455 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS 456 457enum target_prot_type { 458 TARGET_DIF_TYPE0_PROT, 459 TARGET_DIF_TYPE1_PROT, 460 TARGET_DIF_TYPE2_PROT, 461 TARGET_DIF_TYPE3_PROT, 462}; 463 464enum target_core_dif_check { 465 TARGET_DIF_CHECK_GUARD = 0x1 << 0, 466 TARGET_DIF_CHECK_APPTAG = 0x1 << 1, 467 TARGET_DIF_CHECK_REFTAG = 0x1 << 2, 468}; 469 470struct se_dif_v1_tuple { 471 __be16 guard_tag; 472 __be16 app_tag; 473 __be32 ref_tag; 474}; 475 476/* for sam_task_attr */ 477#define TCM_SIMPLE_TAG 0x20 478#define TCM_HEAD_TAG 0x21 479#define TCM_ORDERED_TAG 0x22 480#define TCM_ACA_TAG 0x24 481 482struct se_cmd { 483 /* SAM response code being sent to initiator */ 484 u8 scsi_status; 485 u8 scsi_asc; 486 u8 scsi_ascq; 487 u16 scsi_sense_length; 488 /* Delay for ALUA Active/NonOptimized state access in milliseconds */ 489 int alua_nonop_delay; 490 /* See include/linux/dma-mapping.h */ 491 enum dma_data_direction data_direction; 492 /* For SAM Task Attribute */ 493 int sam_task_attr; 494 /* Used for se_sess->sess_tag_pool */ 495 unsigned int map_tag; 496 /* Transport protocol dependent state, see transport_state_table */ 497 enum transport_state_table t_state; 498 unsigned cmd_wait_set:1; 499 unsigned unknown_data_length:1; 500 /* See se_cmd_flags_table */ 501 u32 se_cmd_flags; 502 u32 se_ordered_id; 503 /* Total size in bytes associated with command */ 504 u32 data_length; 505 u32 residual_count; 506 u32 orig_fe_lun; 507 /* Persistent Reservation key */ 508 u64 pr_res_key; 509 /* Used for sense data */ 510 void *sense_buffer; 511 struct list_head se_delayed_node; 512 struct list_head se_qf_node; 513 struct se_device *se_dev; 514 struct se_dev_entry *se_deve; 515 struct se_lun *se_lun; 516 /* Only used for internal passthrough and legacy TCM fabric modules */ 517 struct se_session *se_sess; 518 struct se_tmr_req *se_tmr_req; 519 struct list_head se_cmd_list; 520 struct completion cmd_wait_comp; 521 struct kref cmd_kref; 522 const struct target_core_fabric_ops *se_tfo; 523 sense_reason_t (*execute_cmd)(struct se_cmd *); 524 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *, 525 u32, enum dma_data_direction); 526 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *); 527 528 unsigned char *t_task_cdb; 529 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; 530 unsigned long long t_task_lba; 531 unsigned int t_task_nolb; 532 unsigned int transport_state; 533#define CMD_T_ABORTED (1 << 0) 534#define CMD_T_ACTIVE (1 << 1) 535#define CMD_T_COMPLETE (1 << 2) 536#define CMD_T_SENT (1 << 4) 537#define CMD_T_STOP (1 << 5) 538#define CMD_T_DEV_ACTIVE (1 << 7) 539#define CMD_T_REQUEST_STOP (1 << 8) 540#define CMD_T_BUSY (1 << 9) 541#define CMD_T_TAS (1 << 10) 542#define CMD_T_FABRIC_STOP (1 << 11) 543 spinlock_t t_state_lock; 544 struct completion t_transport_stop_comp; 545 546 struct work_struct work; 547 548 struct scatterlist *t_data_sg; 549 struct scatterlist *t_data_sg_orig; 550 unsigned int t_data_nents; 551 unsigned int t_data_nents_orig; 552 void *t_data_vmap; 553 struct scatterlist *t_bidi_data_sg; 554 unsigned int t_bidi_data_nents; 555 556 struct list_head state_list; 557 bool state_active; 558 559 /* old task stop completion, consider merging with some of the above */ 560 struct completion task_stop_comp; 561 562 /* backend private data */ 563 void *priv; 564 565 /* Used for lun->lun_ref counting */ 566 int lun_ref_active; 567 568 /* DIF related members */ 569 enum target_prot_op prot_op; 570 enum target_prot_type prot_type; 571 u8 prot_checks; 572 u32 prot_length; 573 u32 reftag_seed; 574 struct scatterlist *t_prot_sg; 575 unsigned int t_prot_nents; 576 sense_reason_t pi_err; 577 sector_t bad_sector; 578 bool prot_pto; 579}; 580 581struct se_ua { 582 u8 ua_asc; 583 u8 ua_ascq; 584 struct se_node_acl *ua_nacl; 585 struct list_head ua_nacl_list; 586}; 587 588struct se_node_acl { 589 char initiatorname[TRANSPORT_IQN_LEN]; 590 /* Used to signal demo mode created ACL, disabled by default */ 591 bool dynamic_node_acl; 592 bool acl_stop:1; 593 u32 queue_depth; 594 u32 acl_index; 595 enum target_prot_type saved_prot_type; 596#define MAX_ACL_TAG_SIZE 64 597 char acl_tag[MAX_ACL_TAG_SIZE]; 598 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 599 atomic_t acl_pr_ref_count; 600 struct se_dev_entry **device_list; 601 struct se_session *nacl_sess; 602 struct se_portal_group *se_tpg; 603 spinlock_t device_list_lock; 604 spinlock_t nacl_sess_lock; 605 struct config_group acl_group; 606 struct config_group acl_attrib_group; 607 struct config_group acl_auth_group; 608 struct config_group acl_param_group; 609 struct config_group acl_fabric_stat_group; 610 struct config_group *acl_default_groups[5]; 611 struct list_head acl_list; 612 struct list_head acl_sess_list; 613 struct completion acl_free_comp; 614 struct kref acl_kref; 615}; 616 617struct se_session { 618 unsigned sess_tearing_down:1; 619 u64 sess_bin_isid; 620 enum target_prot_op sup_prot_ops; 621 enum target_prot_type sess_prot_type; 622 struct se_node_acl *se_node_acl; 623 struct se_portal_group *se_tpg; 624 void *fabric_sess_ptr; 625 struct list_head sess_list; 626 struct list_head sess_acl_list; 627 struct list_head sess_cmd_list; 628 struct list_head sess_wait_list; 629 spinlock_t sess_cmd_lock; 630 struct kref sess_kref; 631 void *sess_cmd_map; 632 struct percpu_ida sess_tag_pool; 633}; 634 635struct se_device; 636struct se_transform_info; 637struct scatterlist; 638 639struct se_ml_stat_grps { 640 struct config_group stat_group; 641 struct config_group scsi_auth_intr_group; 642 struct config_group scsi_att_intr_port_group; 643}; 644 645struct se_lun_acl { 646 char initiatorname[TRANSPORT_IQN_LEN]; 647 u32 mapped_lun; 648 struct se_node_acl *se_lun_nacl; 649 struct se_lun *se_lun; 650 struct list_head lacl_list; 651 struct config_group se_lun_group; 652 struct se_ml_stat_grps ml_stat_grps; 653}; 654 655struct se_dev_entry { 656 bool def_pr_registered; 657 /* See transport_lunflags_table */ 658 u32 lun_flags; 659 u32 mapped_lun; 660 u32 total_cmds; 661 u64 pr_res_key; 662 u64 creation_time; 663 u32 attach_count; 664 u64 read_bytes; 665 u64 write_bytes; 666 atomic_t ua_count; 667 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 668 atomic_t pr_ref_count; 669 struct se_lun_acl *se_lun_acl; 670 spinlock_t ua_lock; 671 struct se_lun *se_lun; 672 struct list_head alua_port_list; 673 struct list_head ua_list; 674}; 675 676struct se_dev_attrib { 677 int emulate_model_alias; 678 int emulate_dpo; 679 int emulate_fua_write; 680 int emulate_fua_read; 681 int emulate_write_cache; 682 int emulate_ua_intlck_ctrl; 683 int emulate_tas; 684 int emulate_tpu; 685 int emulate_tpws; 686 int emulate_caw; 687 int emulate_3pc; 688 int pi_prot_format; 689 enum target_prot_type pi_prot_type; 690 enum target_prot_type hw_pi_prot_type; 691 int enforce_pr_isids; 692 int force_pr_aptpl; 693 int is_nonrot; 694 int emulate_rest_reord; 695 u32 hw_block_size; 696 u32 block_size; 697 u32 hw_max_sectors; 698 u32 optimal_sectors; 699 u32 hw_queue_depth; 700 u32 queue_depth; 701 u32 max_unmap_lba_count; 702 u32 max_unmap_block_desc_count; 703 u32 unmap_granularity; 704 u32 unmap_granularity_alignment; 705 u32 max_write_same_len; 706 u32 max_bytes_per_io; 707 struct se_device *da_dev; 708 struct config_group da_group; 709}; 710 711struct se_port_stat_grps { 712 struct config_group stat_group; 713 struct config_group scsi_port_group; 714 struct config_group scsi_tgt_port_group; 715 struct config_group scsi_transport_group; 716}; 717 718struct se_lun { 719#define SE_LUN_LINK_MAGIC 0xffff7771 720 u32 lun_link_magic; 721 /* See transport_lun_status_table */ 722 enum transport_lun_status_table lun_status; 723 u32 lun_access; 724 u32 lun_flags; 725 u32 unpacked_lun; 726 atomic_t lun_acl_count; 727 spinlock_t lun_acl_lock; 728 spinlock_t lun_sep_lock; 729 struct completion lun_shutdown_comp; 730 struct list_head lun_acl_list; 731 struct se_device *lun_se_dev; 732 struct se_port *lun_sep; 733 struct config_group lun_group; 734 struct se_port_stat_grps port_stat_grps; 735 struct completion lun_ref_comp; 736 struct percpu_ref lun_ref; 737}; 738 739struct se_dev_stat_grps { 740 struct config_group stat_group; 741 struct config_group scsi_dev_group; 742 struct config_group scsi_tgt_dev_group; 743 struct config_group scsi_lu_group; 744}; 745 746struct se_device { 747#define SE_DEV_LINK_MAGIC 0xfeeddeef 748 u32 dev_link_magic; 749 /* RELATIVE TARGET PORT IDENTIFER Counter */ 750 u16 dev_rpti_counter; 751 /* Used for SAM Task Attribute ordering */ 752 u32 dev_cur_ordered_id; 753 u32 dev_flags; 754#define DF_CONFIGURED 0x00000001 755#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 756#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 757#define DF_USING_UDEV_PATH 0x00000008 758#define DF_USING_ALIAS 0x00000010 759 u32 dev_port_count; 760 /* Physical device queue depth */ 761 u32 queue_depth; 762 /* Used for SPC-2 reservations enforce of ISIDs */ 763 u64 dev_res_bin_isid; 764 /* Pointer to transport specific device structure */ 765 u32 dev_index; 766 u64 creation_time; 767 atomic_long_t num_resets; 768 atomic_long_t num_cmds; 769 atomic_long_t read_bytes; 770 atomic_long_t write_bytes; 771 /* Active commands on this virtual SE device */ 772 atomic_t simple_cmds; 773 atomic_t dev_ordered_id; 774 atomic_t dev_ordered_sync; 775 atomic_t dev_qf_count; 776 int export_count; 777 spinlock_t delayed_cmd_lock; 778 spinlock_t execute_task_lock; 779 spinlock_t dev_reservation_lock; 780 unsigned int dev_reservation_flags; 781#define DRF_SPC2_RESERVATIONS 0x00000001 782#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 783 spinlock_t se_port_lock; 784 spinlock_t se_tmr_lock; 785 spinlock_t qf_cmd_lock; 786 struct semaphore caw_sem; 787 /* Used for legacy SPC-2 reservationsa */ 788 struct se_node_acl *dev_reserved_node_acl; 789 /* Used for ALUA Logical Unit Group membership */ 790 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; 791 /* Used for SPC-3 Persistent Reservations */ 792 struct t10_pr_registration *dev_pr_res_holder; 793 struct list_head dev_sep_list; 794 struct list_head dev_tmr_list; 795 struct workqueue_struct *tmr_wq; 796 struct work_struct qf_work_queue; 797 struct list_head delayed_cmd_list; 798 struct list_head state_list; 799 struct list_head qf_cmd_list; 800 struct list_head g_dev_node; 801 /* Pointer to associated SE HBA */ 802 struct se_hba *se_hba; 803 /* T10 Inquiry and VPD WWN Information */ 804 struct t10_wwn t10_wwn; 805 /* T10 Asymmetric Logical Unit Assignment for Target Ports */ 806 struct t10_alua t10_alua; 807 /* T10 SPC-2 + SPC-3 Reservations */ 808 struct t10_reservation t10_pr; 809 struct se_dev_attrib dev_attrib; 810 struct config_group dev_group; 811 struct config_group dev_pr_group; 812 struct se_dev_stat_grps dev_stat_grps; 813#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ 814 unsigned char dev_alias[SE_DEV_ALIAS_LEN]; 815#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ 816 unsigned char udev_path[SE_UDEV_PATH_LEN]; 817 /* Pointer to template of function pointers for transport */ 818 struct se_subsystem_api *transport; 819 /* Linked list for struct se_hba struct se_device list */ 820 struct list_head dev_list; 821 struct se_lun xcopy_lun; 822 /* Protection Information */ 823 int prot_length; 824}; 825 826struct se_hba { 827 u16 hba_tpgt; 828 u32 hba_id; 829 /* See hba_flags_table */ 830 u32 hba_flags; 831 /* Virtual iSCSI devices attached. */ 832 u32 dev_count; 833 u32 hba_index; 834 /* Pointer to transport specific host structure. */ 835 void *hba_ptr; 836 struct list_head hba_node; 837 spinlock_t device_lock; 838 struct config_group hba_group; 839 struct mutex hba_access_mutex; 840 struct se_subsystem_api *transport; 841}; 842 843struct scsi_port_stats { 844 u64 cmd_pdus; 845 u64 tx_data_octets; 846 u64 rx_data_octets; 847}; 848 849struct se_port { 850 /* RELATIVE TARGET PORT IDENTIFER */ 851 u16 sep_rtpi; 852 int sep_tg_pt_secondary_stat; 853 int sep_tg_pt_secondary_write_md; 854 u32 sep_index; 855 struct scsi_port_stats sep_stats; 856 /* Used for ALUA Target Port Groups membership */ 857 atomic_t sep_tg_pt_secondary_offline; 858 /* Used for PR ALL_TG_PT=1 */ 859 atomic_t sep_tg_pt_ref_cnt; 860 spinlock_t sep_alua_lock; 861 struct mutex sep_tg_pt_md_mutex; 862 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem; 863 struct se_lun *sep_lun; 864 struct se_portal_group *sep_tpg; 865 struct list_head sep_alua_list; 866 struct list_head sep_list; 867}; 868 869struct se_tpg_np { 870 struct se_portal_group *tpg_np_parent; 871 struct config_group tpg_np_group; 872}; 873 874struct se_portal_group { 875 /* Type of target portal group, see transport_tpg_type_table */ 876 enum transport_tpg_type_table se_tpg_type; 877 /* Number of ACLed Initiator Nodes for this TPG */ 878 u32 num_node_acls; 879 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ 880 atomic_t tpg_pr_ref_count; 881 /* Spinlock for adding/removing ACLed Nodes */ 882 spinlock_t acl_node_lock; 883 /* Spinlock for adding/removing sessions */ 884 spinlock_t session_lock; 885 spinlock_t tpg_lun_lock; 886 /* Pointer to $FABRIC_MOD portal group */ 887 void *se_tpg_fabric_ptr; 888 struct list_head se_tpg_node; 889 /* linked list for initiator ACL list */ 890 struct list_head acl_node_list; 891 struct se_lun **tpg_lun_list; 892 struct se_lun tpg_virt_lun0; 893 /* List of TCM sessions associated wth this TPG */ 894 struct list_head tpg_sess_list; 895 /* Pointer to $FABRIC_MOD dependent code */ 896 const struct target_core_fabric_ops *se_tpg_tfo; 897 struct se_wwn *se_tpg_wwn; 898 struct config_group tpg_group; 899 struct config_group *tpg_default_groups[7]; 900 struct config_group tpg_lun_group; 901 struct config_group tpg_np_group; 902 struct config_group tpg_acl_group; 903 struct config_group tpg_attrib_group; 904 struct config_group tpg_auth_group; 905 struct config_group tpg_param_group; 906}; 907 908struct se_wwn { 909 struct target_fabric_configfs *wwn_tf; 910 struct config_group wwn_group; 911 struct config_group *wwn_default_groups[2]; 912 struct config_group fabric_stat_group; 913}; 914 915static inline void atomic_inc_mb(atomic_t *v) 916{ 917 smp_mb__before_atomic(); 918 atomic_inc(v); 919 smp_mb__after_atomic(); 920} 921 922static inline void atomic_dec_mb(atomic_t *v) 923{ 924 smp_mb__before_atomic(); 925 atomic_dec(v); 926 smp_mb__after_atomic(); 927} 928 929#endif /* TARGET_CORE_BASE_H */ 930