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_ADD_SENSE_LEN_OFFSET                7
  39 #define SPC_ASC_KEY_OFFSET                      12
  40 #define SPC_ASCQ_KEY_OFFSET                     13
  41 #define TRANSPORT_IQN_LEN                       224
  42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  43 #define LU_GROUP_NAME_BUF                       256
  44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  45 #define TG_PT_GROUP_NAME_BUF                    256
  46 /* Used to parse VPD into struct t10_vpd */
  47 #define VPD_TMP_BUF_SIZE                        128
  48 /* Used by transport_generic_cmd_sequencer() */
  49 #define READ_BLOCK_LEN                          6
  50 #define READ_CAP_LEN                            8
  51 #define READ_POSITION_LEN                       20
  52 #define INQUIRY_LEN                             36
  53 /* Used by transport_get_inquiry_vpd_serial() */
  54 #define INQUIRY_VPD_SERIAL_LEN                  254
  55 /* Used by transport_get_inquiry_vpd_device_ident() */
  56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  57
  58 /* Attempts before moving from SHORT to LONG */
  59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
  60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
  61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  62
  63 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  64
  65 /*
  66  * struct se_subsystem_dev->su_dev_flags
  67 */
  68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL            0x00000001
  69 #define SDF_EMULATED_VPD_UNIT_SERIAL            0x00000002
  70 #define SDF_USING_UDEV_PATH                     0x00000004
  71 #define SDF_USING_ALIAS                         0x00000008
  72
  73 /*
  74  * struct se_device->dev_flags
  75  */
  76 #define DF_READ_ONLY                            0x00000001
  77 #define DF_SPC2_RESERVATIONS                    0x00000002
  78 #define DF_SPC2_RESERVATIONS_WITH_ISID          0x00000004
  79
  80 /* struct se_dev_attrib sanity values */
  81 /* Default max_unmap_lba_count */
  82 #define DA_MAX_UNMAP_LBA_COUNT                  0
  83 /* Default max_unmap_block_desc_count */
  84 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  85 /* Default unmap_granularity */
  86 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  87 /* Default unmap_granularity_alignment */
  88 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  89 /* Emulation for Direct Page Out */
  90 #define DA_EMULATE_DPO                          0
  91 /* Emulation for Forced Unit Access WRITEs */
  92 #define DA_EMULATE_FUA_WRITE                    1
  93 /* Emulation for Forced Unit Access READs */
  94 #define DA_EMULATE_FUA_READ                     0
  95 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  96 #define DA_EMULATE_WRITE_CACHE                  0
  97 /* Emulation for UNIT ATTENTION Interlock Control */
  98 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  99 /* Emulation for TASK_ABORTED status (TAS) by default */
 100 #define DA_EMULATE_TAS                          1
 101 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
 102 #define DA_EMULATE_TPU                          0
 103 /*
 104  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 105  * block/blk-lib.c:blkdev_issue_discard()
 106  */
 107 #define DA_EMULATE_TPWS                         0
 108 /* No Emulation for PSCSI by default */
 109 #define DA_EMULATE_RESERVATIONS                 0
 110 /* No Emulation for PSCSI by default */
 111 #define DA_EMULATE_ALUA                         0
 112 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 113 #define DA_ENFORCE_PR_ISIDS                     1
 114 #define DA_STATUS_MAX_SECTORS_MIN               16
 115 #define DA_STATUS_MAX_SECTORS_MAX               8192
 116 /* By default don't report non-rotating (solid state) medium */
 117 #define DA_IS_NONROT                            0
 118 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 119 #define DA_EMULATE_REST_REORD                   0
 120
 121 #define SE_MODE_PAGE_BUF                        512
 122
 123
 124 /* struct se_hba->hba_flags */
 125 enum hba_flags_table {
 126         HBA_FLAGS_INTERNAL_USE  = 0x01,
 127         HBA_FLAGS_PSCSI_MODE    = 0x02,
 128 };
 129
 130 /* struct se_lun->lun_status */
 131 enum transport_lun_status_table {
 132         TRANSPORT_LUN_STATUS_FREE = 0,
 133         TRANSPORT_LUN_STATUS_ACTIVE = 1,
 134 };
 135
 136 /* struct se_portal_group->se_tpg_type */
 137 enum transport_tpg_type_table {
 138         TRANSPORT_TPG_TYPE_NORMAL = 0,
 139         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
 140 };
 141
 142 /* struct se_task->task_flags */
 143 enum se_task_flags {
 144         TF_ACTIVE               = (1 << 0),
 145         TF_SENT                 = (1 << 1),
 146         TF_REQUEST_STOP         = (1 << 2),
 147         TF_HAS_SENSE            = (1 << 3),
 148 };
 149
 150 /* Special transport agnostic struct se_cmd->t_states */
 151 enum transport_state_table {
 152         TRANSPORT_NO_STATE      = 0,
 153         TRANSPORT_NEW_CMD       = 1,
 154         TRANSPORT_WRITE_PENDING = 3,
 155         TRANSPORT_PROCESS_WRITE = 4,
 156         TRANSPORT_PROCESSING    = 5,
 157         TRANSPORT_COMPLETE      = 6,
 158         TRANSPORT_PROCESS_TMR   = 9,
 159         TRANSPORT_ISTATE_PROCESSING = 11,
 160         TRANSPORT_NEW_CMD_MAP   = 16,
 161         TRANSPORT_COMPLETE_QF_WP = 18,
 162         TRANSPORT_COMPLETE_QF_OK = 19,
 163 };
 164
 165 /* Used for struct se_cmd->se_cmd_flags */
 166 enum se_cmd_flags_table {
 167         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 168         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 169         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 170         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
 171         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
 172         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
 173         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
 174         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
 175         SCF_FUA                         = 0x00000200,
 176         SCF_SE_LUN_CMD                  = 0x00000800,
 177         SCF_SE_ALLOW_EOO                = 0x00001000,
 178         SCF_BIDI                        = 0x00002000,
 179         SCF_SENT_CHECK_CONDITION        = 0x00004000,
 180         SCF_OVERFLOW_BIT                = 0x00008000,
 181         SCF_UNDERFLOW_BIT               = 0x00010000,
 182         SCF_SENT_DELAYED_TAS            = 0x00020000,
 183         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
 184         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
 185         SCF_UNUSED                      = 0x00100000,
 186         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
 187 };
 188
 189 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 190 enum transport_lunflags_table {
 191         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 192         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 193         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 194         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 195 };
 196
 197 /* struct se_device->dev_status */
 198 enum transport_device_status_table {
 199         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
 200         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
 201         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
 202         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
 203         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
 204         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
 205 };
 206
 207 /*
 208  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 209  * to signal which ASC/ASCQ sense payload should be built.
 210  */
 211 enum tcm_sense_reason_table {
 212         TCM_NON_EXISTENT_LUN                    = 0x01,
 213         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
 214         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
 215         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
 216         TCM_SERVICE_CRC_ERROR                   = 0x05,
 217         TCM_SNACK_REJECTED                      = 0x06,
 218         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
 219         TCM_INVALID_CDB_FIELD                   = 0x08,
 220         TCM_INVALID_PARAMETER_LIST              = 0x09,
 221         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
 222         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
 223         TCM_WRITE_PROTECTED                     = 0x0c,
 224         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
 225         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
 226         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
 227         TCM_RESERVATION_CONFLICT                = 0x10,
 228 };
 229
 230 enum target_sc_flags_table {
 231         TARGET_SCF_BIDI_OP              = 0x01,
 232         TARGET_SCF_ACK_KREF             = 0x02,
 233 };
 234
 235 /* fabric independent task management function values */
 236 enum tcm_tmreq_table {
 237         TMR_ABORT_TASK          = 1,
 238         TMR_ABORT_TASK_SET      = 2,
 239         TMR_CLEAR_ACA           = 3,
 240         TMR_CLEAR_TASK_SET      = 4,
 241         TMR_LUN_RESET           = 5,
 242         TMR_TARGET_WARM_RESET   = 6,
 243         TMR_TARGET_COLD_RESET   = 7,
 244         TMR_FABRIC_TMR          = 255,
 245 };
 246
 247 /* fabric independent task management response values */
 248 enum tcm_tmrsp_table {
 249         TMR_FUNCTION_COMPLETE           = 0,
 250         TMR_TASK_DOES_NOT_EXIST         = 1,
 251         TMR_LUN_DOES_NOT_EXIST          = 2,
 252         TMR_TASK_STILL_ALLEGIANT        = 3,
 253         TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
 254         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 5,
 255         TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
 256         TMR_FUNCTION_REJECTED           = 255,
 257 };
 258
 259 struct se_obj {
 260         atomic_t obj_access_count;
 261 };
 262
 263 /*
 264  * Used by TCM Core internally to signal if ALUA emulation is enabled or
 265  * disabled, or running in with TCM/pSCSI passthrough mode
 266  */
 267 typedef enum {
 268         SPC_ALUA_PASSTHROUGH,
 269         SPC2_ALUA_DISABLED,
 270         SPC3_ALUA_EMULATED
 271 } t10_alua_index_t;
 272
 273 /*
 274  * Used by TCM Core internally to signal if SAM Task Attribute emulation
 275  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 276  */
 277 typedef enum {
 278         SAM_TASK_ATTR_PASSTHROUGH,
 279         SAM_TASK_ATTR_UNTAGGED,
 280         SAM_TASK_ATTR_EMULATED
 281 } t10_task_attr_index_t;
 282
 283 /*
 284  * Used for target SCSI statistics
 285  */
 286 typedef enum {
 287         SCSI_INST_INDEX,
 288         SCSI_DEVICE_INDEX,
 289         SCSI_AUTH_INTR_INDEX,
 290         SCSI_INDEX_TYPE_MAX
 291 } scsi_index_t;
 292
 293 struct se_cmd;
 294
 295 struct t10_alua {
 296         t10_alua_index_t alua_type;
 297         /* ALUA Target Port Group ID */
 298         u16     alua_tg_pt_gps_counter;
 299         u32     alua_tg_pt_gps_count;
 300         spinlock_t tg_pt_gps_lock;
 301         struct se_subsystem_dev *t10_sub_dev;
 302         /* Used for default ALUA Target Port Group */
 303         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 304         /* Used for default ALUA Target Port Group ConfigFS group */
 305         struct config_group alua_tg_pt_gps_group;
 306         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 307         struct list_head tg_pt_gps_list;
 308 };
 309
 310 struct t10_alua_lu_gp {
 311         u16     lu_gp_id;
 312         int     lu_gp_valid_id;
 313         u32     lu_gp_members;
 314         atomic_t lu_gp_ref_cnt;
 315         spinlock_t lu_gp_lock;
 316         struct config_group lu_gp_group;
 317         struct list_head lu_gp_node;
 318         struct list_head lu_gp_mem_list;
 319 };
 320
 321 struct t10_alua_lu_gp_member {
 322         bool lu_gp_assoc;
 323         atomic_t lu_gp_mem_ref_cnt;
 324         spinlock_t lu_gp_mem_lock;
 325         struct t10_alua_lu_gp *lu_gp;
 326         struct se_device *lu_gp_mem_dev;
 327         struct list_head lu_gp_mem_list;
 328 };
 329
 330 struct t10_alua_tg_pt_gp {
 331         u16     tg_pt_gp_id;
 332         int     tg_pt_gp_valid_id;
 333         int     tg_pt_gp_alua_access_status;
 334         int     tg_pt_gp_alua_access_type;
 335         int     tg_pt_gp_nonop_delay_msecs;
 336         int     tg_pt_gp_trans_delay_msecs;
 337         int     tg_pt_gp_pref;
 338         int     tg_pt_gp_write_metadata;
 339         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 340 #define ALUA_MD_BUF_LEN                         1024
 341         u32     tg_pt_gp_md_buf_len;
 342         u32     tg_pt_gp_members;
 343         atomic_t tg_pt_gp_alua_access_state;
 344         atomic_t tg_pt_gp_ref_cnt;
 345         spinlock_t tg_pt_gp_lock;
 346         struct mutex tg_pt_gp_md_mutex;
 347         struct se_subsystem_dev *tg_pt_gp_su_dev;
 348         struct config_group tg_pt_gp_group;
 349         struct list_head tg_pt_gp_list;
 350         struct list_head tg_pt_gp_mem_list;
 351 };
 352
 353 struct t10_alua_tg_pt_gp_member {
 354         bool tg_pt_gp_assoc;
 355         atomic_t tg_pt_gp_mem_ref_cnt;
 356         spinlock_t tg_pt_gp_mem_lock;
 357         struct t10_alua_tg_pt_gp *tg_pt_gp;
 358         struct se_port *tg_pt;
 359         struct list_head tg_pt_gp_mem_list;
 360 };
 361
 362 struct t10_vpd {
 363         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 364         int protocol_identifier_set;
 365         u32 protocol_identifier;
 366         u32 device_identifier_code_set;
 367         u32 association;
 368         u32 device_identifier_type;
 369         struct list_head vpd_list;
 370 };
 371
 372 struct t10_wwn {
 373         char vendor[8];
 374         char model[16];
 375         char revision[4];
 376         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 377         spinlock_t t10_vpd_lock;
 378         struct se_subsystem_dev *t10_sub_dev;
 379         struct config_group t10_wwn_group;
 380         struct list_head t10_vpd_list;
 381 };
 382
 383
 384 /*
 385  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 386  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 387  * mode
 388  */
 389 typedef enum {
 390         SPC_PASSTHROUGH,
 391         SPC2_RESERVATIONS,
 392         SPC3_PERSISTENT_RESERVATIONS
 393 } t10_reservations_index_t;
 394
 395 struct t10_pr_registration {
 396         /* Used for fabrics that contain WWN+ISID */
 397 #define PR_REG_ISID_LEN                         16
 398         /* PR_REG_ISID_LEN + ',i,0x' */
 399 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 400         char pr_reg_isid[PR_REG_ISID_LEN];
 401         /* Used during APTPL metadata reading */
 402 #define PR_APTPL_MAX_IPORT_LEN                  256
 403         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 404         /* Used during APTPL metadata reading */
 405 #define PR_APTPL_MAX_TPORT_LEN                  256
 406         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 407         /* For writing out live meta data */
 408         unsigned char *pr_aptpl_buf;
 409         u16 pr_aptpl_rpti;
 410         u16 pr_reg_tpgt;
 411         /* Reservation effects all target ports */
 412         int pr_reg_all_tg_pt;
 413         /* Activate Persistence across Target Power Loss */
 414         int pr_reg_aptpl;
 415         int pr_res_holder;
 416         int pr_res_type;
 417         int pr_res_scope;
 418         /* Used for fabric initiator WWPNs using a ISID */
 419         bool isid_present_at_reg;
 420         u32 pr_res_mapped_lun;
 421         u32 pr_aptpl_target_lun;
 422         u32 pr_res_generation;
 423         u64 pr_reg_bin_isid;
 424         u64 pr_res_key;
 425         atomic_t pr_res_holders;
 426         struct se_node_acl *pr_reg_nacl;
 427         struct se_dev_entry *pr_reg_deve;
 428         struct se_lun *pr_reg_tg_pt_lun;
 429         struct list_head pr_reg_list;
 430         struct list_head pr_reg_abort_list;
 431         struct list_head pr_reg_aptpl_list;
 432         struct list_head pr_reg_atp_list;
 433         struct list_head pr_reg_atp_mem_list;
 434 };
 435
 436 /*
 437  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 438  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 439  * core_setup_reservations()
 440  */
 441 struct t10_reservation_ops {
 442         int (*t10_reservation_check)(struct se_cmd *, u32 *);
 443         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
 444         int (*t10_pr_register)(struct se_cmd *);
 445         int (*t10_pr_clear)(struct se_cmd *);
 446 };
 447
 448 struct t10_reservation {
 449         /* Reservation effects all target ports */
 450         int pr_all_tg_pt;
 451         /* Activate Persistence across Target Power Loss enabled
 452          * for SCSI device */
 453         int pr_aptpl_active;
 454         /* Used by struct t10_reservation->pr_aptpl_buf_len */
 455 #define PR_APTPL_BUF_LEN                        8192
 456         u32 pr_aptpl_buf_len;
 457         u32 pr_generation;
 458         t10_reservations_index_t res_type;
 459         spinlock_t registration_lock;
 460         spinlock_t aptpl_reg_lock;
 461         /*
 462          * This will always be set by one individual I_T Nexus.
 463          * However with all_tg_pt=1, other I_T Nexus from the
 464          * same initiator can access PR reg/res info on a different
 465          * target port.
 466          *
 467          * There is also the 'All Registrants' case, where there is
 468          * a single *pr_res_holder of the reservation, but all
 469          * registrations are considered reservation holders.
 470          */
 471         struct se_node_acl *pr_res_holder;
 472         struct list_head registration_list;
 473         struct list_head aptpl_reg_list;
 474         struct t10_reservation_ops pr_ops;
 475 };
 476
 477 struct se_queue_req {
 478         int                     state;
 479         struct se_cmd           *cmd;
 480         struct list_head        qr_list;
 481 };
 482
 483 struct se_queue_obj {
 484         atomic_t                queue_cnt;
 485         spinlock_t              cmd_queue_lock;
 486         struct list_head        qobj_list;
 487         wait_queue_head_t       thread_wq;
 488 };
 489
 490 struct se_task {
 491         unsigned long long      task_lba;
 492         u32                     task_sectors;
 493         u32                     task_size;
 494         struct se_cmd           *task_se_cmd;
 495         struct scatterlist      *task_sg;
 496         u32                     task_sg_nents;
 497         u16                     task_flags;
 498         u8                      task_scsi_status;
 499         enum dma_data_direction task_data_direction;
 500         struct list_head        t_list;
 501         struct list_head        t_execute_list;
 502         struct list_head        t_state_list;
 503         bool                    t_state_active;
 504         struct completion       task_stop_comp;
 505 };
 506
 507 struct se_cmd {
 508         /* SAM response code being sent to initiator */
 509         u8                      scsi_status;
 510         u8                      scsi_asc;
 511         u8                      scsi_ascq;
 512         u8                      scsi_sense_reason;
 513         u16                     scsi_sense_length;
 514         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 515         int                     alua_nonop_delay;
 516         /* See include/linux/dma-mapping.h */
 517         enum dma_data_direction data_direction;
 518         /* For SAM Task Attribute */
 519         int                     sam_task_attr;
 520         /* Transport protocol dependent state, see transport_state_table */
 521         enum transport_state_table t_state;
 522         /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
 523         unsigned                check_release:1;
 524         unsigned                cmd_wait_set:1;
 525         /* See se_cmd_flags_table */
 526         u32                     se_cmd_flags;
 527         u32                     se_ordered_id;
 528         /* Total size in bytes associated with command */
 529         u32                     data_length;
 530         /* SCSI Presented Data Transfer Length */
 531         u32                     cmd_spdtl;
 532         u32                     residual_count;
 533         u32                     orig_fe_lun;
 534         /* Persistent Reservation key */
 535         u64                     pr_res_key;
 536         /* Used for sense data */
 537         void                    *sense_buffer;
 538         struct list_head        se_delayed_node;
 539         struct list_head        se_lun_node;
 540         struct list_head        se_qf_node;
 541         struct se_device      *se_dev;
 542         struct se_dev_entry   *se_deve;
 543         struct se_lun           *se_lun;
 544         /* Only used for internal passthrough and legacy TCM fabric modules */
 545         struct se_session       *se_sess;
 546         struct se_tmr_req       *se_tmr_req;
 547         struct list_head        se_queue_node;
 548         struct list_head        se_cmd_list;
 549         struct completion       cmd_wait_comp;
 550         struct kref             cmd_kref;
 551         struct target_core_fabric_ops *se_tfo;
 552         int (*execute_task)(struct se_task *);
 553         void (*transport_complete_callback)(struct se_cmd *);
 554
 555         unsigned char           *t_task_cdb;
 556         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 557         unsigned long long      t_task_lba;
 558         int                     t_tasks_failed;
 559         u32                     t_tasks_sg_chained_no;
 560         atomic_t                t_fe_count;
 561         atomic_t                t_se_count;
 562         atomic_t                t_task_cdbs_left;
 563         atomic_t                t_task_cdbs_ex_left;
 564         atomic_t                t_task_cdbs_sent;
 565         atomic_t                t_transport_aborted;
 566         atomic_t                t_transport_active;
 567         atomic_t                t_transport_complete;
 568         atomic_t                t_transport_queue_active;
 569         atomic_t                t_transport_sent;
 570         atomic_t                t_transport_stop;
 571         atomic_t                transport_dev_active;
 572         atomic_t                transport_lun_active;
 573         atomic_t                transport_lun_fe_stop;
 574         atomic_t                transport_lun_stop;
 575         spinlock_t              t_state_lock;
 576         struct completion       t_transport_stop_comp;
 577         struct completion       transport_lun_fe_stop_comp;
 578         struct completion       transport_lun_stop_comp;
 579         struct scatterlist      *t_tasks_sg_chained;
 580
 581         struct work_struct      work;
 582
 583         struct scatterlist      *t_data_sg;
 584         unsigned int            t_data_nents;
 585         struct scatterlist      *t_bidi_data_sg;
 586         unsigned int            t_bidi_data_nents;
 587
 588         /* Used for BIDI READ */
 589         struct list_head        t_task_list;
 590         u32                     t_task_list_num;
 591
 592 };
 593
 594 struct se_tmr_req {
 595         /* Task Management function to be preformed */
 596         u8                      function;
 597         /* Task Management response to send */
 598         u8                      response;
 599         int                     call_transport;
 600         /* Reference to ITT that Task Mgmt should be preformed */
 601         u32                     ref_task_tag;
 602         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
 603         u64                     ref_task_lun;
 604         void                    *fabric_tmr_ptr;
 605         struct se_cmd           *task_cmd;
 606         struct se_cmd           *ref_cmd;
 607         struct se_device        *tmr_dev;
 608         struct se_lun           *tmr_lun;
 609         struct list_head        tmr_list;
 610 };
 611
 612 struct se_ua {
 613         u8                      ua_asc;
 614         u8                      ua_ascq;
 615         struct se_node_acl      *ua_nacl;
 616         struct list_head        ua_dev_list;
 617         struct list_head        ua_nacl_list;
 618 };
 619
 620 struct se_node_acl {
 621         char                    initiatorname[TRANSPORT_IQN_LEN];
 622         /* Used to signal demo mode created ACL, disabled by default */
 623         bool                    dynamic_node_acl;
 624         u32                     queue_depth;
 625         u32                     acl_index;
 626         u64                     num_cmds;
 627         u64                     read_bytes;
 628         u64                     write_bytes;
 629         spinlock_t              stats_lock;
 630         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 631         atomic_t                acl_pr_ref_count;
 632         struct se_dev_entry     *device_list;
 633         struct se_session       *nacl_sess;
 634         struct se_portal_group *se_tpg;
 635         spinlock_t              device_list_lock;
 636         spinlock_t              nacl_sess_lock;
 637         struct config_group     acl_group;
 638         struct config_group     acl_attrib_group;
 639         struct config_group     acl_auth_group;
 640         struct config_group     acl_param_group;
 641         struct config_group     acl_fabric_stat_group;
 642         struct config_group     *acl_default_groups[5];
 643         struct list_head        acl_list;
 644         struct list_head        acl_sess_list;
 645 };
 646
 647 struct se_session {
 648         unsigned                sess_tearing_down:1;
 649         u64                     sess_bin_isid;
 650         struct se_node_acl      *se_node_acl;
 651         struct se_portal_group *se_tpg;
 652         void                    *fabric_sess_ptr;
 653         struct list_head        sess_list;
 654         struct list_head        sess_acl_list;
 655         struct list_head        sess_cmd_list;
 656         struct list_head        sess_wait_list;
 657         spinlock_t              sess_cmd_lock;
 658 };
 659
 660 struct se_device;
 661 struct se_transform_info;
 662 struct scatterlist;
 663
 664 struct se_ml_stat_grps {
 665         struct config_group     stat_group;
 666         struct config_group     scsi_auth_intr_group;
 667         struct config_group     scsi_att_intr_port_group;
 668 };
 669
 670 struct se_lun_acl {
 671         char                    initiatorname[TRANSPORT_IQN_LEN];
 672         u32                     mapped_lun;
 673         struct se_node_acl      *se_lun_nacl;
 674         struct se_lun           *se_lun;
 675         struct list_head        lacl_list;
 676         struct config_group     se_lun_group;
 677         struct se_ml_stat_grps  ml_stat_grps;
 678 };
 679
 680 struct se_dev_entry {
 681         bool                    def_pr_registered;
 682         /* See transport_lunflags_table */
 683         u32                     lun_flags;
 684         u32                     deve_cmds;
 685         u32                     mapped_lun;
 686         u32                     average_bytes;
 687         u32                     last_byte_count;
 688         u32                     total_cmds;
 689         u32                     total_bytes;
 690         u64                     pr_res_key;
 691         u64                     creation_time;
 692         u32                     attach_count;
 693         u64                     read_bytes;
 694         u64                     write_bytes;
 695         atomic_t                ua_count;
 696         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 697         atomic_t                pr_ref_count;
 698         struct se_lun_acl       *se_lun_acl;
 699         spinlock_t              ua_lock;
 700         struct se_lun           *se_lun;
 701         struct list_head        alua_port_list;
 702         struct list_head        ua_list;
 703 };
 704
 705 struct se_dev_limits {
 706         /* Max supported HW queue depth */
 707         u32             hw_queue_depth;
 708         /* Max supported virtual queue depth */
 709         u32             queue_depth;
 710         /* From include/linux/blkdev.h for the other HW/SW limits. */
 711         struct queue_limits limits;
 712 };
 713
 714 struct se_dev_attrib {
 715         int             emulate_dpo;
 716         int             emulate_fua_write;
 717         int             emulate_fua_read;
 718         int             emulate_write_cache;
 719         int             emulate_ua_intlck_ctrl;
 720         int             emulate_tas;
 721         int             emulate_tpu;
 722         int             emulate_tpws;
 723         int             emulate_reservations;
 724         int             emulate_alua;
 725         int             enforce_pr_isids;
 726         int             is_nonrot;
 727         int             emulate_rest_reord;
 728         u32             hw_block_size;
 729         u32             block_size;
 730         u32             hw_max_sectors;
 731         u32             max_sectors;
 732         u32             optimal_sectors;
 733         u32             hw_queue_depth;
 734         u32             queue_depth;
 735         u32             max_unmap_lba_count;
 736         u32             max_unmap_block_desc_count;
 737         u32             unmap_granularity;
 738         u32             unmap_granularity_alignment;
 739         struct se_subsystem_dev *da_sub_dev;
 740         struct config_group da_group;
 741 };
 742
 743 struct se_dev_stat_grps {
 744         struct config_group stat_group;
 745         struct config_group scsi_dev_group;
 746         struct config_group scsi_tgt_dev_group;
 747         struct config_group scsi_lu_group;
 748 };
 749
 750 struct se_subsystem_dev {
 751 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
 752 #define SE_DEV_ALIAS_LEN                512
 753         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
 754 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
 755 #define SE_UDEV_PATH_LEN                512
 756         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
 757         u32             su_dev_flags;
 758         struct se_hba *se_dev_hba;
 759         struct se_device *se_dev_ptr;
 760         struct se_dev_attrib se_dev_attrib;
 761         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 762         struct t10_alua t10_alua;
 763         /* T10 Inquiry and VPD WWN Information */
 764         struct t10_wwn  t10_wwn;
 765         /* T10 SPC-2 + SPC-3 Reservations */
 766         struct t10_reservation t10_pr;
 767         spinlock_t      se_dev_lock;
 768         void            *se_dev_su_ptr;
 769         struct config_group se_dev_group;
 770         /* For T10 Reservations */
 771         struct config_group se_dev_pr_group;
 772         /* For target_core_stat.c groups */
 773         struct se_dev_stat_grps dev_stat_grps;
 774 };
 775
 776 struct se_device {
 777         /* RELATIVE TARGET PORT IDENTIFER Counter */
 778         u16                     dev_rpti_counter;
 779         /* Used for SAM Task Attribute ordering */
 780         u32                     dev_cur_ordered_id;
 781         u32                     dev_flags;
 782         u32                     dev_port_count;
 783         /* See transport_device_status_table */
 784         u32                     dev_status;
 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 */