include/target/target_core_base.h

   1 #ifndef TARGET_CORE_BASE_H
   2 #define TARGET_CORE_BASE_H
   3
   4 #include <linux/in.h>
   5 #include <linux/configfs.h>
   6 #include <linux/dma-mapping.h>
   7 #include <linux/blkdev.h>
   8 #include <scsi/scsi_cmnd.h>
   9 #include <net/sock.h>
  10 #include <net/tcp.h>
  11
  12 #define TARGET_CORE_MOD_VERSION         "v4.1.0-rc1-ml"
  13 #define TARGET_CORE_VERSION             TARGET_CORE_MOD_VERSION
  14
  15 /* Maximum Number of LUNs per Target Portal Group */
  16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
  17 #define TRANSPORT_MAX_LUNS_PER_TPG              256
  18 /*
  19  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
  20  *
  21  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
  22  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
  23  * 16-byte CDBs by default and require an extra allocation for
  24  * 32-byte CDBs to because of legacy issues.
  25  *
  26  * Within TCM Core there are no such legacy limitiations, so we go ahead
  27  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
  28  * within all TCM Core and subsystem plugin code.
  29  */
  30 #define TCM_MAX_COMMAND_SIZE                    32
  31 /*
  32  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  33  * defined 96, but the real limit is 252 (or 260 including the header)
  34  */
  35 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
  36 /* Used by transport_send_check_condition_and_sense() */
  37 #define SPC_SENSE_KEY_OFFSET                    2
  38 #define SPC_ASC_KEY_OFFSET                      12
  39 #define SPC_ASCQ_KEY_OFFSET                     13
  40 #define TRANSPORT_IQN_LEN                       224
  41 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  42 #define LU_GROUP_NAME_BUF                       256
  43 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  44 #define TG_PT_GROUP_NAME_BUF                    256
  45 /* Used to parse VPD into struct t10_vpd */
  46 #define VPD_TMP_BUF_SIZE                        128
  47 /* Used by transport_generic_cmd_sequencer() */
  48 #define READ_BLOCK_LEN                          6
  49 #define READ_CAP_LEN                            8
  50 #define READ_POSITION_LEN                       20
  51 #define INQUIRY_LEN                             36
  52 /* Used by transport_get_inquiry_vpd_serial() */
  53 #define INQUIRY_VPD_SERIAL_LEN                  254
  54 /* Used by transport_get_inquiry_vpd_device_ident() */
  55 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  56
  57 /* Attempts before moving from SHORT to LONG */
  58 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
  59 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
  60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  61
  62 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  63
  64 /*
  65  * struct se_subsystem_dev->su_dev_flags
  66 */
  67 #define SDF_FIRMWARE_VPD_UNIT_SERIAL            0x00000001
  68 #define SDF_EMULATED_VPD_UNIT_SERIAL            0x00000002
  69 #define SDF_USING_UDEV_PATH                     0x00000004
  70 #define SDF_USING_ALIAS                         0x00000008
  71
  72 /*
  73  * struct se_device->dev_flags
  74  */
  75 #define DF_READ_ONLY                            0x00000001
  76 #define DF_SPC2_RESERVATIONS                    0x00000002
  77 #define DF_SPC2_RESERVATIONS_WITH_ISID          0x00000004
  78
  79 /* struct se_dev_attrib sanity values */
  80 /* Default max_unmap_lba_count */
  81 #define DA_MAX_UNMAP_LBA_COUNT                  0
  82 /* Default max_unmap_block_desc_count */
  83 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  84 /* Default unmap_granularity */
  85 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  86 /* Default unmap_granularity_alignment */
  87 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  88 /* Emulation for Direct Page Out */
  89 #define DA_EMULATE_DPO                          0
  90 /* Emulation for Forced Unit Access WRITEs */
  91 #define DA_EMULATE_FUA_WRITE                    1
  92 /* Emulation for Forced Unit Access READs */
  93 #define DA_EMULATE_FUA_READ                     0
  94 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  95 #define DA_EMULATE_WRITE_CACHE                  0
  96 /* Emulation for UNIT ATTENTION Interlock Control */
  97 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  98 /* Emulation for TASK_ABORTED status (TAS) by default */
  99 #define DA_EMULATE_TAS                          1
 100 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
 101 #define DA_EMULATE_TPU                          0
 102 /*
 103  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 104  * block/blk-lib.c:blkdev_issue_discard()
 105  */
 106 #define DA_EMULATE_TPWS                         0
 107 /* No Emulation for PSCSI by default */
 108 #define DA_EMULATE_RESERVATIONS                 0
 109 /* No Emulation for PSCSI by default */
 110 #define DA_EMULATE_ALUA                         0
 111 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 112 #define DA_ENFORCE_PR_ISIDS                     1
 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_MODE_PAGE_BUF                        512
 121
 122
 123 /* struct se_hba->hba_flags */
 124 enum hba_flags_table {
 125         HBA_FLAGS_INTERNAL_USE  = 0x01,
 126         HBA_FLAGS_PSCSI_MODE    = 0x02,
 127 };
 128
 129 /* struct se_lun->lun_status */
 130 enum transport_lun_status_table {
 131         TRANSPORT_LUN_STATUS_FREE = 0,
 132         TRANSPORT_LUN_STATUS_ACTIVE = 1,
 133 };
 134
 135 /* struct se_portal_group->se_tpg_type */
 136 enum transport_tpg_type_table {
 137         TRANSPORT_TPG_TYPE_NORMAL = 0,
 138         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
 139 };
 140
 141 /* struct se_task->task_flags */
 142 enum se_task_flags {
 143         TF_ACTIVE               = (1 << 0),
 144         TF_SENT                 = (1 << 1),
 145         TF_REQUEST_STOP         = (1 << 2),
 146         TF_HAS_SENSE            = (1 << 3),
 147 };
 148
 149 /* Special transport agnostic struct se_cmd->t_states */
 150 enum transport_state_table {
 151         TRANSPORT_NO_STATE      = 0,
 152         TRANSPORT_NEW_CMD       = 1,
 153         TRANSPORT_WRITE_PENDING = 3,
 154         TRANSPORT_PROCESS_WRITE = 4,
 155         TRANSPORT_PROCESSING    = 5,
 156         TRANSPORT_COMPLETE      = 6,
 157         TRANSPORT_PROCESS_TMR   = 9,
 158         TRANSPORT_ISTATE_PROCESSING = 11,
 159         TRANSPORT_NEW_CMD_MAP   = 16,
 160         TRANSPORT_COMPLETE_QF_WP = 18,
 161         TRANSPORT_COMPLETE_QF_OK = 19,
 162 };
 163
 164 /* Used for struct se_cmd->se_cmd_flags */
 165 enum se_cmd_flags_table {
 166         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 167         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 168         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 169         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
 170         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
 171         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
 172         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
 173         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
 174         SCF_FUA                         = 0x00000200,
 175         SCF_SE_LUN_CMD                  = 0x00000800,
 176         SCF_SE_ALLOW_EOO                = 0x00001000,
 177         SCF_BIDI                        = 0x00002000,
 178         SCF_SENT_CHECK_CONDITION        = 0x00004000,
 179         SCF_OVERFLOW_BIT                = 0x00008000,
 180         SCF_UNDERFLOW_BIT               = 0x00010000,
 181         SCF_SENT_DELAYED_TAS            = 0x00020000,
 182         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
 183         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
 184         SCF_UNUSED                      = 0x00100000,
 185         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
 186 };
 187
 188 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 189 enum transport_lunflags_table {
 190         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 191         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 192         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 193         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 194 };
 195
 196 /* struct se_device->dev_status */
 197 enum transport_device_status_table {
 198         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
 199         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
 200         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
 201         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
 202         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
 203         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
 204 };
 205
 206 /*
 207  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 208  * to signal which ASC/ASCQ sense payload should be built.
 209  */
 210 enum tcm_sense_reason_table {
 211         TCM_NON_EXISTENT_LUN                    = 0x01,
 212         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
 213         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
 214         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
 215         TCM_SERVICE_CRC_ERROR                   = 0x05,
 216         TCM_SNACK_REJECTED                      = 0x06,
 217         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
 218         TCM_INVALID_CDB_FIELD                   = 0x08,
 219         TCM_INVALID_PARAMETER_LIST              = 0x09,
 220         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
 221         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
 222         TCM_WRITE_PROTECTED                     = 0x0c,
 223         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
 224         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
 225         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
 226         TCM_RESERVATION_CONFLICT                = 0x10,
 227 };
 228
 229 enum target_sc_flags_table {
 230         TARGET_SCF_BIDI_OP              = 0x01,
 231         TARGET_SCF_ACK_KREF             = 0x02,
 232 };
 233
 234 /* fabric independent task management function values */
 235 enum tcm_tmreq_table {
 236         TMR_ABORT_TASK          = 1,
 237         TMR_ABORT_TASK_SET      = 2,
 238         TMR_CLEAR_ACA           = 3,
 239         TMR_CLEAR_TASK_SET      = 4,
 240         TMR_LUN_RESET           = 5,
 241         TMR_TARGET_WARM_RESET   = 6,
 242         TMR_TARGET_COLD_RESET   = 7,
 243         TMR_FABRIC_TMR          = 255,
 244 };
 245
 246 /* fabric independent task management response values */
 247 enum tcm_tmrsp_table {
 248         TMR_FUNCTION_COMPLETE           = 0,
 249         TMR_TASK_DOES_NOT_EXIST         = 1,
 250         TMR_LUN_DOES_NOT_EXIST          = 2,
 251         TMR_TASK_STILL_ALLEGIANT        = 3,
 252         TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
 253         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 5,
 254         TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
 255         TMR_FUNCTION_REJECTED           = 255,
 256 };
 257
 258 struct se_obj {
 259         atomic_t obj_access_count;
 260 };
 261
 262 /*
 263  * Used by TCM Core internally to signal if ALUA emulation is enabled or
 264  * disabled, or running in with TCM/pSCSI passthrough mode
 265  */
 266 typedef enum {
 267         SPC_ALUA_PASSTHROUGH,
 268         SPC2_ALUA_DISABLED,
 269         SPC3_ALUA_EMULATED
 270 } t10_alua_index_t;
 271
 272 /*
 273  * Used by TCM Core internally to signal if SAM Task Attribute emulation
 274  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 275  */
 276 typedef enum {
 277         SAM_TASK_ATTR_PASSTHROUGH,
 278         SAM_TASK_ATTR_UNTAGGED,
 279         SAM_TASK_ATTR_EMULATED
 280 } t10_task_attr_index_t;
 281
 282 /*
 283  * Used for target SCSI statistics
 284  */
 285 typedef enum {
 286         SCSI_INST_INDEX,
 287         SCSI_DEVICE_INDEX,
 288         SCSI_AUTH_INTR_INDEX,
 289         SCSI_INDEX_TYPE_MAX
 290 } scsi_index_t;
 291
 292 struct se_cmd;
 293
 294 struct t10_alua {
 295         t10_alua_index_t alua_type;
 296         /* ALUA Target Port Group ID */
 297         u16     alua_tg_pt_gps_counter;
 298         u32     alua_tg_pt_gps_count;
 299         spinlock_t tg_pt_gps_lock;
 300         struct se_subsystem_dev *t10_sub_dev;
 301         /* Used for default ALUA Target Port Group */
 302         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 303         /* Used for default ALUA Target Port Group ConfigFS group */
 304         struct config_group alua_tg_pt_gps_group;
 305         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 306         struct list_head tg_pt_gps_list;
 307 };
 308
 309 struct t10_alua_lu_gp {
 310         u16     lu_gp_id;
 311         int     lu_gp_valid_id;
 312         u32     lu_gp_members;
 313         atomic_t lu_gp_ref_cnt;
 314         spinlock_t lu_gp_lock;
 315         struct config_group lu_gp_group;
 316         struct list_head lu_gp_node;
 317         struct list_head lu_gp_mem_list;
 318 };
 319
 320 struct t10_alua_lu_gp_member {
 321         bool lu_gp_assoc;
 322         atomic_t lu_gp_mem_ref_cnt;
 323         spinlock_t lu_gp_mem_lock;
 324         struct t10_alua_lu_gp *lu_gp;
 325         struct se_device *lu_gp_mem_dev;
 326         struct list_head lu_gp_mem_list;
 327 };
 328
 329 struct t10_alua_tg_pt_gp {
 330         u16     tg_pt_gp_id;
 331         int     tg_pt_gp_valid_id;
 332         int     tg_pt_gp_alua_access_status;
 333         int     tg_pt_gp_alua_access_type;
 334         int     tg_pt_gp_nonop_delay_msecs;
 335         int     tg_pt_gp_trans_delay_msecs;
 336         int     tg_pt_gp_pref;
 337         int     tg_pt_gp_write_metadata;
 338         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 339 #define ALUA_MD_BUF_LEN                         1024
 340         u32     tg_pt_gp_md_buf_len;
 341         u32     tg_pt_gp_members;
 342         atomic_t tg_pt_gp_alua_access_state;
 343         atomic_t tg_pt_gp_ref_cnt;
 344         spinlock_t tg_pt_gp_lock;
 345         struct mutex tg_pt_gp_md_mutex;
 346         struct se_subsystem_dev *tg_pt_gp_su_dev;
 347         struct config_group tg_pt_gp_group;
 348         struct list_head tg_pt_gp_list;
 349         struct list_head tg_pt_gp_mem_list;
 350 };
 351
 352 struct t10_alua_tg_pt_gp_member {
 353         bool tg_pt_gp_assoc;
 354         atomic_t tg_pt_gp_mem_ref_cnt;
 355         spinlock_t tg_pt_gp_mem_lock;
 356         struct t10_alua_tg_pt_gp *tg_pt_gp;
 357         struct se_port *tg_pt;
 358         struct list_head tg_pt_gp_mem_list;
 359 };
 360
 361 struct t10_vpd {
 362         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 363         int protocol_identifier_set;
 364         u32 protocol_identifier;
 365         u32 device_identifier_code_set;
 366         u32 association;
 367         u32 device_identifier_type;
 368         struct list_head vpd_list;
 369 };
 370
 371 struct t10_wwn {
 372         char vendor[8];
 373         char model[16];
 374         char revision[4];
 375         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 376         spinlock_t t10_vpd_lock;
 377         struct se_subsystem_dev *t10_sub_dev;
 378         struct config_group t10_wwn_group;
 379         struct list_head t10_vpd_list;
 380 };
 381
 382
 383 /*
 384  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 385  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 386  * mode
 387  */
 388 typedef enum {
 389         SPC_PASSTHROUGH,
 390         SPC2_RESERVATIONS,
 391         SPC3_PERSISTENT_RESERVATIONS
 392 } t10_reservations_index_t;
 393
 394 struct t10_pr_registration {
 395         /* Used for fabrics that contain WWN+ISID */
 396 #define PR_REG_ISID_LEN                         16
 397         /* PR_REG_ISID_LEN + ',i,0x' */
 398 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 399         char pr_reg_isid[PR_REG_ISID_LEN];
 400         /* Used during APTPL metadata reading */
 401 #define PR_APTPL_MAX_IPORT_LEN                  256
 402         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 403         /* Used during APTPL metadata reading */
 404 #define PR_APTPL_MAX_TPORT_LEN                  256
 405         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 406         /* For writing out live meta data */
 407         unsigned char *pr_aptpl_buf;
 408         u16 pr_aptpl_rpti;
 409         u16 pr_reg_tpgt;
 410         /* Reservation effects all target ports */
 411         int pr_reg_all_tg_pt;
 412         /* Activate Persistence across Target Power Loss */
 413         int pr_reg_aptpl;
 414         int pr_res_holder;
 415         int pr_res_type;
 416         int pr_res_scope;
 417         /* Used for fabric initiator WWPNs using a ISID */
 418         bool isid_present_at_reg;
 419         u32 pr_res_mapped_lun;
 420         u32 pr_aptpl_target_lun;
 421         u32 pr_res_generation;
 422         u64 pr_reg_bin_isid;
 423         u64 pr_res_key;
 424         atomic_t pr_res_holders;
 425         struct se_node_acl *pr_reg_nacl;
 426         struct se_dev_entry *pr_reg_deve;
 427         struct se_lun *pr_reg_tg_pt_lun;
 428         struct list_head pr_reg_list;
 429         struct list_head pr_reg_abort_list;
 430         struct list_head pr_reg_aptpl_list;
 431         struct list_head pr_reg_atp_list;
 432         struct list_head pr_reg_atp_mem_list;
 433 };
 434
 435 /*
 436  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 437  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 438  * core_setup_reservations()
 439  */
 440 struct t10_reservation_ops {
 441         int (*t10_reservation_check)(struct se_cmd *, u32 *);
 442         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
 443         int (*t10_pr_register)(struct se_cmd *);
 444         int (*t10_pr_clear)(struct se_cmd *);
 445 };
 446
 447 struct t10_reservation {
 448         /* Reservation effects all target ports */
 449         int pr_all_tg_pt;
 450         /* Activate Persistence across Target Power Loss enabled
 451          * for SCSI device */
 452         int pr_aptpl_active;
 453         /* Used by struct t10_reservation->pr_aptpl_buf_len */
 454 #define PR_APTPL_BUF_LEN                        8192
 455         u32 pr_aptpl_buf_len;
 456         u32 pr_generation;
 457         t10_reservations_index_t res_type;
 458         spinlock_t registration_lock;
 459         spinlock_t aptpl_reg_lock;
 460         /*
 461          * This will always be set by one individual I_T Nexus.
 462          * However with all_tg_pt=1, other I_T Nexus from the
 463          * same initiator can access PR reg/res info on a different
 464          * target port.
 465          *
 466          * There is also the 'All Registrants' case, where there is
 467          * a single *pr_res_holder of the reservation, but all
 468          * registrations are considered reservation holders.
 469          */
 470         struct se_node_acl *pr_res_holder;
 471         struct list_head registration_list;
 472         struct list_head aptpl_reg_list;
 473         struct t10_reservation_ops pr_ops;
 474 };
 475
 476 struct se_queue_req {
 477         int                     state;
 478         struct se_cmd           *cmd;
 479         struct list_head        qr_list;
 480 };
 481
 482 struct se_queue_obj {
 483         atomic_t                queue_cnt;
 484         spinlock_t              cmd_queue_lock;
 485         struct list_head        qobj_list;
 486         wait_queue_head_t       thread_wq;
 487 };
 488
 489 struct se_task {
 490         unsigned long long      task_lba;
 491         u32                     task_sectors;
 492         u32                     task_size;
 493         struct se_cmd           *task_se_cmd;
 494         struct scatterlist      *task_sg;
 495         u32                     task_sg_nents;
 496         u16                     task_flags;
 497         u8                      task_scsi_status;
 498         enum dma_data_direction task_data_direction;
 499         struct list_head        t_list;
 500         struct list_head        t_execute_list;
 501         struct list_head        t_state_list;
 502         bool                    t_state_active;
 503         struct completion       task_stop_comp;
 504 };
 505
 506 struct se_cmd {
 507         /* SAM response code being sent to initiator */
 508         u8                      scsi_status;
 509         u8                      scsi_asc;
 510         u8                      scsi_ascq;
 511         u8                      scsi_sense_reason;
 512         u16                     scsi_sense_length;
 513         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 514         int                     alua_nonop_delay;
 515         /* See include/linux/dma-mapping.h */
 516         enum dma_data_direction data_direction;
 517         /* For SAM Task Attribute */
 518         int                     sam_task_attr;
 519         /* Transport protocol dependent state, see transport_state_table */
 520         enum transport_state_table t_state;
 521         /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
 522         unsigned                check_release:1;
 523         unsigned                cmd_wait_set:1;
 524         /* See se_cmd_flags_table */
 525         u32                     se_cmd_flags;
 526         u32                     se_ordered_id;
 527         /* Total size in bytes associated with command */
 528         u32                     data_length;
 529         /* SCSI Presented Data Transfer Length */
 530         u32                     cmd_spdtl;
 531         u32                     residual_count;
 532         u32                     orig_fe_lun;
 533         /* Persistent Reservation key */
 534         u64                     pr_res_key;
 535         /* Used for sense data */
 536         void                    *sense_buffer;
 537         struct list_head        se_delayed_node;
 538         struct list_head        se_lun_node;
 539         struct list_head        se_qf_node;
 540         struct se_device      *se_dev;
 541         struct se_dev_entry   *se_deve;
 542         struct se_lun           *se_lun;
 543         /* Only used for internal passthrough and legacy TCM fabric modules */
 544         struct se_session       *se_sess;
 545         struct se_tmr_req       *se_tmr_req;
 546         struct list_head        se_queue_node;
 547         struct list_head        se_cmd_list;
 548         struct completion       cmd_wait_comp;
 549         struct kref             cmd_kref;
 550         struct target_core_fabric_ops *se_tfo;
 551         int (*execute_task)(struct se_task *);
 552         void (*transport_complete_callback)(struct se_cmd *);
 553
 554         unsigned char           *t_task_cdb;
 555         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 556         unsigned long long      t_task_lba;
 557         int                     t_tasks_failed;
 558         u32                     t_tasks_sg_chained_no;
 559         atomic_t                t_fe_count;
 560         atomic_t                t_se_count;
 561         atomic_t                t_task_cdbs_left;
 562         atomic_t                t_task_cdbs_ex_left;
 563         atomic_t                t_task_cdbs_sent;
 564         atomic_t                t_transport_aborted;
 565         atomic_t                t_transport_active;
 566         atomic_t                t_transport_complete;
 567         atomic_t                t_transport_queue_active;
 568         atomic_t                t_transport_sent;
 569         atomic_t                t_transport_stop;
 570         atomic_t                transport_dev_active;
 571         atomic_t                transport_lun_active;
 572         atomic_t                transport_lun_fe_stop;
 573         atomic_t                transport_lun_stop;
 574         spinlock_t              t_state_lock;
 575         struct completion       t_transport_stop_comp;
 576         struct completion       transport_lun_fe_stop_comp;
 577         struct completion       transport_lun_stop_comp;
 578         struct scatterlist      *t_tasks_sg_chained;
 579
 580         struct work_struct      work;
 581
 582         struct scatterlist      *t_data_sg;
 583         unsigned int            t_data_nents;
 584         struct scatterlist      *t_bidi_data_sg;
 585         unsigned int            t_bidi_data_nents;
 586
 587         /* Used for BIDI READ */
 588         struct list_head        t_task_list;
 589         u32                     t_task_list_num;
 590
 591 };
 592
 593 struct se_tmr_req {
 594         /* Task Management function to be preformed */
 595         u8                      function;
 596         /* Task Management response to send */
 597         u8                      response;
 598         int                     call_transport;
 599         /* Reference to ITT that Task Mgmt should be preformed */
 600         u32                     ref_task_tag;
 601         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
 602         u64                     ref_task_lun;
 603         void                    *fabric_tmr_ptr;
 604         struct se_cmd           *task_cmd;
 605         struct se_cmd           *ref_cmd;
 606         struct se_device        *tmr_dev;
 607         struct se_lun           *tmr_lun;
 608         struct list_head        tmr_list;
 609 };
 610
 611 struct se_ua {
 612         u8                      ua_asc;
 613         u8                      ua_ascq;
 614         struct se_node_acl      *ua_nacl;
 615         struct list_head        ua_dev_list;
 616         struct list_head        ua_nacl_list;
 617 };
 618
 619 struct se_node_acl {
 620         char                    initiatorname[TRANSPORT_IQN_LEN];
 621         /* Used to signal demo mode created ACL, disabled by default */
 622         bool                    dynamic_node_acl;
 623         u32                     queue_depth;
 624         u32                     acl_index;
 625         u64                     num_cmds;
 626         u64                     read_bytes;
 627         u64                     write_bytes;
 628         spinlock_t              stats_lock;
 629         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 630         atomic_t                acl_pr_ref_count;
 631         struct se_dev_entry     *device_list;
 632         struct se_session       *nacl_sess;
 633         struct se_portal_group *se_tpg;
 634         spinlock_t              device_list_lock;
 635         spinlock_t              nacl_sess_lock;
 636         struct config_group     acl_group;
 637         struct config_group     acl_attrib_group;
 638         struct config_group     acl_auth_group;
 639         struct config_group     acl_param_group;
 640         struct config_group     acl_fabric_stat_group;
 641         struct config_group     *acl_default_groups[5];
 642         struct list_head        acl_list;
 643         struct list_head        acl_sess_list;
 644 };
 645
 646 struct se_session {
 647         unsigned                sess_tearing_down:1;
 648         u64                     sess_bin_isid;
 649         struct se_node_acl      *se_node_acl;
 650         struct se_portal_group *se_tpg;
 651         void                    *fabric_sess_ptr;
 652         struct list_head        sess_list;
 653         struct list_head        sess_acl_list;
 654         struct list_head        sess_cmd_list;
 655         struct list_head        sess_wait_list;
 656         spinlock_t              sess_cmd_lock;
 657 };
 658
 659 struct se_device;
 660 struct se_transform_info;
 661 struct scatterlist;
 662
 663 struct se_ml_stat_grps {
 664         struct config_group     stat_group;
 665         struct config_group     scsi_auth_intr_group;
 666         struct config_group     scsi_att_intr_port_group;
 667 };
 668
 669 struct se_lun_acl {
 670         char                    initiatorname[TRANSPORT_IQN_LEN];
 671         u32                     mapped_lun;
 672         struct se_node_acl      *se_lun_nacl;
 673         struct se_lun           *se_lun;
 674         struct list_head        lacl_list;
 675         struct config_group     se_lun_group;
 676         struct se_ml_stat_grps  ml_stat_grps;
 677 };
 678
 679 struct se_dev_entry {
 680         bool                    def_pr_registered;
 681         /* See transport_lunflags_table */
 682         u32                     lun_flags;
 683         u32                     deve_cmds;
 684         u32                     mapped_lun;
 685         u32                     average_bytes;
 686         u32                     last_byte_count;
 687         u32                     total_cmds;
 688         u32                     total_bytes;
 689         u64                     pr_res_key;
 690         u64                     creation_time;
 691         u32                     attach_count;
 692         u64                     read_bytes;
 693         u64                     write_bytes;
 694         atomic_t                ua_count;
 695         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 696         atomic_t                pr_ref_count;
 697         struct se_lun_acl       *se_lun_acl;
 698         spinlock_t              ua_lock;
 699         struct se_lun           *se_lun;
 700         struct list_head        alua_port_list;
 701         struct list_head        ua_list;
 702 };
 703
 704 struct se_dev_limits {
 705         /* Max supported HW queue depth */
 706         u32             hw_queue_depth;
 707         /* Max supported virtual queue depth */
 708         u32             queue_depth;
 709         /* From include/linux/blkdev.h for the other HW/SW limits. */
 710         struct queue_limits limits;
 711 };
 712
 713 struct se_dev_attrib {
 714         int             emulate_dpo;
 715         int             emulate_fua_write;
 716         int             emulate_fua_read;
 717         int             emulate_write_cache;
 718         int             emulate_ua_intlck_ctrl;
 719         int             emulate_tas;
 720         int             emulate_tpu;
 721         int             emulate_tpws;
 722         int             emulate_reservations;
 723         int             emulate_alua;
 724         int             enforce_pr_isids;
 725         int             is_nonrot;
 726         int             emulate_rest_reord;
 727         u32             hw_block_size;
 728         u32             block_size;
 729         u32             hw_max_sectors;
 730         u32             max_sectors;
 731         u32             optimal_sectors;
 732         u32             hw_queue_depth;
 733         u32             queue_depth;
 734         u32             max_unmap_lba_count;
 735         u32             max_unmap_block_desc_count;
 736         u32             unmap_granularity;
 737         u32             unmap_granularity_alignment;
 738         struct se_subsystem_dev *da_sub_dev;
 739         struct config_group da_group;
 740 };
 741
 742 struct se_dev_stat_grps {
 743         struct config_group stat_group;
 744         struct config_group scsi_dev_group;
 745         struct config_group scsi_tgt_dev_group;
 746         struct config_group scsi_lu_group;
 747 };
 748
 749 struct se_subsystem_dev {
 750 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
 751 #define SE_DEV_ALIAS_LEN                512
 752         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
 753 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
 754 #define SE_UDEV_PATH_LEN                512
 755         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
 756         u32             su_dev_flags;
 757         struct se_hba *se_dev_hba;
 758         struct se_device *se_dev_ptr;
 759         struct se_dev_attrib se_dev_attrib;
 760         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 761         struct t10_alua t10_alua;
 762         /* T10 Inquiry and VPD WWN Information */
 763         struct t10_wwn  t10_wwn;
 764         /* T10 SPC-2 + SPC-3 Reservations */
 765         struct t10_reservation t10_pr;
 766         spinlock_t      se_dev_lock;
 767         void            *se_dev_su_ptr;
 768         struct config_group se_dev_group;
 769         /* For T10 Reservations */
 770         struct config_group se_dev_pr_group;
 771         /* For target_core_stat.c groups */
 772         struct se_dev_stat_grps dev_stat_grps;
 773 };
 774
 775 struct se_device {
 776         /* RELATIVE TARGET PORT IDENTIFER Counter */
 777         u16                     dev_rpti_counter;
 778         /* Used for SAM Task Attribute ordering */
 779         u32                     dev_cur_ordered_id;
 780         u32                     dev_flags;
 781         u32                     dev_port_count;
 782         /* See transport_device_status_table */
 783         u32                     dev_status;
 784         u32                     dev_tcq_window_closed;
 785         /* Physical device queue depth */
 786         u32                     queue_depth;
 787         /* Used for SPC-2 reservations enforce of ISIDs */
 788         u64                     dev_res_bin_isid;
 789         t10_task_attr_index_t   dev_task_attr_type;
 790         /* Pointer to transport specific device structure */
 791         void                    *dev_ptr;
 792         u32                     dev_index;
 793         u64                     creation_time;
 794         u32                     num_resets;
 795         u64                     num_cmds;
 796         u64                     read_bytes;
 797         u64                     write_bytes;
 798         spinlock_t              stats_lock;
 799         /* Active commands on this virtual SE device */
 800         atomic_t                simple_cmds;
 801         atomic_t                dev_ordered_id;
 802         atomic_t                execute_tasks;
 803         atomic_t                dev_ordered_sync;
 804         atomic_t                dev_qf_count;
 805         struct se_obj           dev_obj;
 806         struct se_obj           dev_access_obj;
 807         struct se_obj           dev_export_obj;
 808         struct se_queue_obj     dev_queue_obj;
 809         spinlock_t              delayed_cmd_lock;
 810         spinlock_t              execute_task_lock;
 811         spinlock_t              dev_reservation_lock;
 812         spinlock_t              dev_status_lock;
 813         spinlock_t              se_port_lock;
 814         spinlock_t              se_tmr_lock;
 815         spinlock_t              qf_cmd_lock;
 816         /* Used for legacy SPC-2 reservationsa */
 817         struct se_node_acl      *dev_reserved_node_acl;
 818         /* Used for ALUA Logical Unit Group membership */
 819         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 820         /* Used for SPC-3 Persistent Reservations */
 821         struct t10_pr_registration *dev_pr_res_holder;
 822         struct list_head        dev_sep_list;
 823         struct list_head        dev_tmr_list;
 824         /* Pointer to descriptor for processing thread */
 825         struct task_struct      *process_thread;
 826         struct work_struct      qf_work_queue;
 827         struct list_head        delayed_cmd_list;
 828         struct list_head        execute_task_list;
 829         struct list_head        state_task_list;
 830         struct list_head        qf_cmd_list;
 831         /* Pointer to associated SE HBA */
 832         struct se_hba           *se_hba;
 833         struct se_subsystem_dev *se_sub_dev;
 834         /* Pointer to template of function pointers for transport */
 835         struct se_subsystem_api *transport;
 836         /* Linked list for struct se_hba struct se_device list */
 837         struct list_head        dev_list;
 838 };
 839
 840 struct se_hba {
 841         u16                     hba_tpgt;
 842         u32                     hba_id;
 843         /* See hba_flags_table */
 844         u32                     hba_flags;
 845         /* Virtual iSCSI devices attached. */
 846         u32                     dev_count;
 847         u32                     hba_index;
 848         /* Pointer to transport specific host structure. */
 849         void                    *hba_ptr;
 850         /* Linked list for struct se_device */
 851         struct list_head        hba_dev_list;
 852         struct list_head        hba_node;
 853         spinlock_t              device_lock;
 854         struct config_group     hba_group;
 855         struct mutex            hba_access_mutex;
 856         struct se_subsystem_api *transport;
 857 };
 858
 859 struct se_port_stat_grps {
 860         struct config_group stat_group;
 861         struct config_group scsi_port_group;
 862         struct config_group scsi_tgt_port_group;
 863         struct config_group scsi_transport_group;
 864 };
 865
 866 struct se_lun {
 867         /* See transport_lun_status_table */
 868         enum transport_lun_status_table lun_status;
 869         u32                     lun_access;
 870         u32                     lun_flags;
 871         u32                     unpacked_lun;
 872         atomic_t                lun_acl_count;
 873         spinlock_t              lun_acl_lock;
 874         spinlock_t              lun_cmd_lock;
 875         spinlock_t              lun_sep_lock;
 876         struct completion       lun_shutdown_comp;
 877         struct list_head        lun_cmd_list;
 878         struct list_head        lun_acl_list;
 879         struct se_device        *lun_se_dev;
 880         struct se_port          *lun_sep;
 881         struct config_group     lun_group;
 882         struct se_port_stat_grps port_stat_grps;
 883 };
 884
 885 struct scsi_port_stats {
 886        u64     cmd_pdus;
 887        u64     tx_data_octets;
 888        u64     rx_data_octets;
 889 };
 890
 891 struct se_port {
 892         /* RELATIVE TARGET PORT IDENTIFER */
 893         u16             sep_rtpi;
 894         int             sep_tg_pt_secondary_stat;
 895         int             sep_tg_pt_secondary_write_md;
 896         u32             sep_index;
 897         struct scsi_port_stats sep_stats;
 898         /* Used for ALUA Target Port Groups membership */
 899         atomic_t        sep_tg_pt_secondary_offline;
 900         /* Used for PR ALL_TG_PT=1 */
 901         atomic_t        sep_tg_pt_ref_cnt;
 902         spinlock_t      sep_alua_lock;
 903         struct mutex    sep_tg_pt_md_mutex;
 904         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 905         struct se_lun *sep_lun;
 906         struct se_portal_group *sep_tpg;
 907         struct list_head sep_alua_list;
 908         struct list_head sep_list;
 909 };
 910
 911 struct se_tpg_np {
 912         struct se_portal_group *tpg_np_parent;
 913         struct config_group     tpg_np_group;
 914 };
 915
 916 struct se_portal_group {
 917         /* Type of target portal group, see transport_tpg_type_table */
 918         enum transport_tpg_type_table se_tpg_type;
 919         /* Number of ACLed Initiator Nodes for this TPG */
 920         u32                     num_node_acls;
 921         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 922         atomic_t                tpg_pr_ref_count;
 923         /* Spinlock for adding/removing ACLed Nodes */
 924         spinlock_t              acl_node_lock;
 925         /* Spinlock for adding/removing sessions */
 926         spinlock_t              session_lock;
 927         spinlock_t              tpg_lun_lock;
 928         /* Pointer to $FABRIC_MOD portal group */
 929         void                    *se_tpg_fabric_ptr;
 930         struct list_head        se_tpg_node;
 931         /* linked list for initiator ACL list */
 932         struct list_head        acl_node_list;
 933         struct se_lun           *tpg_lun_list;
 934         struct se_lun           tpg_virt_lun0;
 935         /* List of TCM sessions associated wth this TPG */
 936         struct list_head        tpg_sess_list;
 937         /* Pointer to $FABRIC_MOD dependent code */
 938         struct target_core_fabric_ops *se_tpg_tfo;
 939         struct se_wwn           *se_tpg_wwn;
 940         struct config_group     tpg_group;
 941         struct config_group     *tpg_default_groups[6];
 942         struct config_group     tpg_lun_group;
 943         struct config_group     tpg_np_group;
 944         struct config_group     tpg_acl_group;
 945         struct config_group     tpg_attrib_group;
 946         struct config_group     tpg_param_group;
 947 };
 948
 949 struct se_wwn {
 950         struct target_fabric_configfs *wwn_tf;
 951         struct config_group     wwn_group;
 952         struct config_group     *wwn_default_groups[2];
 953         struct config_group     fabric_stat_group;
 954 };
 955
 956 #endif /* TARGET_CORE_BASE_H */