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-rc2-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                        254
  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 /* struct se_dev_attrib sanity values */
  66 /* Default max_unmap_lba_count */
  67 #define DA_MAX_UNMAP_LBA_COUNT                  0
  68 /* Default max_unmap_block_desc_count */
  69 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  70 /* Default unmap_granularity */
  71 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  72 /* Default unmap_granularity_alignment */
  73 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  74 /* Default max_write_same_len, disabled by default */
  75 #define DA_MAX_WRITE_SAME_LEN                   0
  76 /* Default max transfer length */
  77 #define DA_FABRIC_MAX_SECTORS                   8192
  78 /* Use a model alias based on the configfs backend device name */
  79 #define DA_EMULATE_MODEL_ALIAS                  0
  80 /* Emulation for Direct Page Out */
  81 #define DA_EMULATE_DPO                          0
  82 /* Emulation for Forced Unit Access WRITEs */
  83 #define DA_EMULATE_FUA_WRITE                    1
  84 /* Emulation for Forced Unit Access READs */
  85 #define DA_EMULATE_FUA_READ                     0
  86 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  87 #define DA_EMULATE_WRITE_CACHE                  0
  88 /* Emulation for UNIT ATTENTION Interlock Control */
  89 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  90 /* Emulation for TASK_ABORTED status (TAS) by default */
  91 #define DA_EMULATE_TAS                          1
  92 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  93 #define DA_EMULATE_TPU                          0
  94 /*
  95  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  96  * block/blk-lib.c:blkdev_issue_discard()
  97  */
  98 #define DA_EMULATE_TPWS                         0
  99 /* No Emulation for PSCSI by default */
 100 #define DA_EMULATE_ALUA                         0
 101 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 102 #define DA_ENFORCE_PR_ISIDS                     1
 103 #define DA_STATUS_MAX_SECTORS_MIN               16
 104 #define DA_STATUS_MAX_SECTORS_MAX               8192
 105 /* By default don't report non-rotating (solid state) medium */
 106 #define DA_IS_NONROT                            0
 107 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 108 #define DA_EMULATE_REST_REORD                   0
 109
 110 #define SE_INQUIRY_BUF                          512
 111 #define SE_MODE_PAGE_BUF                        512
 112 #define SE_SENSE_BUF                            96
 113
 114 /* struct se_hba->hba_flags */
 115 enum hba_flags_table {
 116         HBA_FLAGS_INTERNAL_USE  = 0x01,
 117         HBA_FLAGS_PSCSI_MODE    = 0x02,
 118 };
 119
 120 /* struct se_lun->lun_status */
 121 enum transport_lun_status_table {
 122         TRANSPORT_LUN_STATUS_FREE = 0,
 123         TRANSPORT_LUN_STATUS_ACTIVE = 1,
 124 };
 125
 126 /* struct se_portal_group->se_tpg_type */
 127 enum transport_tpg_type_table {
 128         TRANSPORT_TPG_TYPE_NORMAL = 0,
 129         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
 130 };
 131
 132 /* Special transport agnostic struct se_cmd->t_states */
 133 enum transport_state_table {
 134         TRANSPORT_NO_STATE      = 0,
 135         TRANSPORT_NEW_CMD       = 1,
 136         TRANSPORT_WRITE_PENDING = 3,
 137         TRANSPORT_PROCESSING    = 5,
 138         TRANSPORT_COMPLETE      = 6,
 139         TRANSPORT_ISTATE_PROCESSING = 11,
 140         TRANSPORT_COMPLETE_QF_WP = 18,
 141         TRANSPORT_COMPLETE_QF_OK = 19,
 142 };
 143
 144 /* Used for struct se_cmd->se_cmd_flags */
 145 enum se_cmd_flags_table {
 146         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 147         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 148         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 149         SCF_SCSI_DATA_CDB               = 0x00000008,
 150         SCF_SCSI_TMR_CDB                = 0x00000010,
 151         SCF_FUA                         = 0x00000080,
 152         SCF_SE_LUN_CMD                  = 0x00000100,
 153         SCF_BIDI                        = 0x00000400,
 154         SCF_SENT_CHECK_CONDITION        = 0x00000800,
 155         SCF_OVERFLOW_BIT                = 0x00001000,
 156         SCF_UNDERFLOW_BIT               = 0x00002000,
 157         SCF_SENT_DELAYED_TAS            = 0x00004000,
 158         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 159         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 160         SCF_ACK_KREF                    = 0x00040000,
 161 };
 162
 163 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 164 enum transport_lunflags_table {
 165         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 166         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 167         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 168         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 169 };
 170
 171 /*
 172  * Used by transport_send_check_condition_and_sense()
 173  * to signal which ASC/ASCQ sense payload should be built.
 174  */
 175 typedef unsigned __bitwise__ sense_reason_t;
 176
 177 enum tcm_sense_reason_table {
 178 #define R(x)    (__force sense_reason_t )(x)
 179         TCM_NO_SENSE                            = R(0x00),
 180         TCM_NON_EXISTENT_LUN                    = R(0x01),
 181         TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
 182         TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
 183         TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
 184         TCM_SERVICE_CRC_ERROR                   = R(0x05),
 185         TCM_SNACK_REJECTED                      = R(0x06),
 186         TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
 187         TCM_INVALID_CDB_FIELD                   = R(0x08),
 188         TCM_INVALID_PARAMETER_LIST              = R(0x09),
 189         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
 190         TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
 191         TCM_WRITE_PROTECTED                     = R(0x0c),
 192         TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
 193         TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
 194         TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
 195         TCM_RESERVATION_CONFLICT                = R(0x10),
 196         TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
 197         TCM_OUT_OF_RESOURCES                    = R(0x12),
 198         TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
 199 #undef R
 200 };
 201
 202 enum target_sc_flags_table {
 203         TARGET_SCF_BIDI_OP              = 0x01,
 204         TARGET_SCF_ACK_KREF             = 0x02,
 205         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 206 };
 207
 208 /* fabric independent task management function values */
 209 enum tcm_tmreq_table {
 210         TMR_ABORT_TASK          = 1,
 211         TMR_ABORT_TASK_SET      = 2,
 212         TMR_CLEAR_ACA           = 3,
 213         TMR_CLEAR_TASK_SET      = 4,
 214         TMR_LUN_RESET           = 5,
 215         TMR_TARGET_WARM_RESET   = 6,
 216         TMR_TARGET_COLD_RESET   = 7,
 217 };
 218
 219 /* fabric independent task management response values */
 220 enum tcm_tmrsp_table {
 221         TMR_FUNCTION_COMPLETE           = 1,
 222         TMR_TASK_DOES_NOT_EXIST         = 2,
 223         TMR_LUN_DOES_NOT_EXIST          = 3,
 224         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
 225         TMR_FUNCTION_REJECTED           = 5,
 226 };
 227
 228 /*
 229  * Used for target SCSI statistics
 230  */
 231 typedef enum {
 232         SCSI_INST_INDEX,
 233         SCSI_DEVICE_INDEX,
 234         SCSI_AUTH_INTR_INDEX,
 235         SCSI_INDEX_TYPE_MAX
 236 } scsi_index_t;
 237
 238 struct se_cmd;
 239
 240 struct t10_alua {
 241         /* ALUA Target Port Group ID */
 242         u16     alua_tg_pt_gps_counter;
 243         u32     alua_tg_pt_gps_count;
 244         spinlock_t tg_pt_gps_lock;
 245         struct se_device *t10_dev;
 246         /* Used for default ALUA Target Port Group */
 247         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 248         /* Used for default ALUA Target Port Group ConfigFS group */
 249         struct config_group alua_tg_pt_gps_group;
 250         struct list_head tg_pt_gps_list;
 251 };
 252
 253 struct t10_alua_lu_gp {
 254         u16     lu_gp_id;
 255         int     lu_gp_valid_id;
 256         u32     lu_gp_members;
 257         atomic_t lu_gp_ref_cnt;
 258         spinlock_t lu_gp_lock;
 259         struct config_group lu_gp_group;
 260         struct list_head lu_gp_node;
 261         struct list_head lu_gp_mem_list;
 262 };
 263
 264 struct t10_alua_lu_gp_member {
 265         bool lu_gp_assoc;
 266         atomic_t lu_gp_mem_ref_cnt;
 267         spinlock_t lu_gp_mem_lock;
 268         struct t10_alua_lu_gp *lu_gp;
 269         struct se_device *lu_gp_mem_dev;
 270         struct list_head lu_gp_mem_list;
 271 };
 272
 273 struct t10_alua_tg_pt_gp {
 274         u16     tg_pt_gp_id;
 275         int     tg_pt_gp_valid_id;
 276         int     tg_pt_gp_alua_access_status;
 277         int     tg_pt_gp_alua_access_type;
 278         int     tg_pt_gp_nonop_delay_msecs;
 279         int     tg_pt_gp_trans_delay_msecs;
 280         int     tg_pt_gp_implict_trans_secs;
 281         int     tg_pt_gp_pref;
 282         int     tg_pt_gp_write_metadata;
 283         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 284 #define ALUA_MD_BUF_LEN                         1024
 285         u32     tg_pt_gp_md_buf_len;
 286         u32     tg_pt_gp_members;
 287         atomic_t tg_pt_gp_alua_access_state;
 288         atomic_t tg_pt_gp_ref_cnt;
 289         spinlock_t tg_pt_gp_lock;
 290         struct mutex tg_pt_gp_md_mutex;
 291         struct se_device *tg_pt_gp_dev;
 292         struct config_group tg_pt_gp_group;
 293         struct list_head tg_pt_gp_list;
 294         struct list_head tg_pt_gp_mem_list;
 295 };
 296
 297 struct t10_alua_tg_pt_gp_member {
 298         bool tg_pt_gp_assoc;
 299         atomic_t tg_pt_gp_mem_ref_cnt;
 300         spinlock_t tg_pt_gp_mem_lock;
 301         struct t10_alua_tg_pt_gp *tg_pt_gp;
 302         struct se_port *tg_pt;
 303         struct list_head tg_pt_gp_mem_list;
 304 };
 305
 306 struct t10_vpd {
 307         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 308         int protocol_identifier_set;
 309         u32 protocol_identifier;
 310         u32 device_identifier_code_set;
 311         u32 association;
 312         u32 device_identifier_type;
 313         struct list_head vpd_list;
 314 };
 315
 316 struct t10_wwn {
 317         char vendor[8];
 318         char model[16];
 319         char revision[4];
 320         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 321         spinlock_t t10_vpd_lock;
 322         struct se_device *t10_dev;
 323         struct config_group t10_wwn_group;
 324         struct list_head t10_vpd_list;
 325 };
 326
 327 struct t10_pr_registration {
 328         /* Used for fabrics that contain WWN+ISID */
 329 #define PR_REG_ISID_LEN                         16
 330         /* PR_REG_ISID_LEN + ',i,0x' */
 331 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 332         char pr_reg_isid[PR_REG_ISID_LEN];
 333         /* Used during APTPL metadata reading */
 334 #define PR_APTPL_MAX_IPORT_LEN                  256
 335         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 336         /* Used during APTPL metadata reading */
 337 #define PR_APTPL_MAX_TPORT_LEN                  256
 338         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 339         u16 pr_aptpl_rpti;
 340         u16 pr_reg_tpgt;
 341         /* Reservation effects all target ports */
 342         int pr_reg_all_tg_pt;
 343         /* Activate Persistence across Target Power Loss */
 344         int pr_reg_aptpl;
 345         int pr_res_holder;
 346         int pr_res_type;
 347         int pr_res_scope;
 348         /* Used for fabric initiator WWPNs using a ISID */
 349         bool isid_present_at_reg;
 350         u32 pr_res_mapped_lun;
 351         u32 pr_aptpl_target_lun;
 352         u32 pr_res_generation;
 353         u64 pr_reg_bin_isid;
 354         u64 pr_res_key;
 355         atomic_t pr_res_holders;
 356         struct se_node_acl *pr_reg_nacl;
 357         struct se_dev_entry *pr_reg_deve;
 358         struct se_lun *pr_reg_tg_pt_lun;
 359         struct list_head pr_reg_list;
 360         struct list_head pr_reg_abort_list;
 361         struct list_head pr_reg_aptpl_list;
 362         struct list_head pr_reg_atp_list;
 363         struct list_head pr_reg_atp_mem_list;
 364 };
 365
 366 struct t10_reservation {
 367         /* Reservation effects all target ports */
 368         int pr_all_tg_pt;
 369         /* Activate Persistence across Target Power Loss enabled
 370          * for SCSI device */
 371         int pr_aptpl_active;
 372 #define PR_APTPL_BUF_LEN                        8192
 373         u32 pr_generation;
 374         spinlock_t registration_lock;
 375         spinlock_t aptpl_reg_lock;
 376         /*
 377          * This will always be set by one individual I_T Nexus.
 378          * However with all_tg_pt=1, other I_T Nexus from the
 379          * same initiator can access PR reg/res info on a different
 380          * target port.
 381          *
 382          * There is also the 'All Registrants' case, where there is
 383          * a single *pr_res_holder of the reservation, but all
 384          * registrations are considered reservation holders.
 385          */
 386         struct se_node_acl *pr_res_holder;
 387         struct list_head registration_list;
 388         struct list_head aptpl_reg_list;
 389 };
 390
 391 struct se_tmr_req {
 392         /* Task Management function to be performed */
 393         u8                      function;
 394         /* Task Management response to send */
 395         u8                      response;
 396         int                     call_transport;
 397         /* Reference to ITT that Task Mgmt should be performed */
 398         u32                     ref_task_tag;
 399         void                    *fabric_tmr_ptr;
 400         struct se_cmd           *task_cmd;
 401         struct se_device        *tmr_dev;
 402         struct se_lun           *tmr_lun;
 403         struct list_head        tmr_list;
 404 };
 405
 406 struct se_cmd {
 407         /* SAM response code being sent to initiator */
 408         u8                      scsi_status;
 409         u8                      scsi_asc;
 410         u8                      scsi_ascq;
 411         u16                     scsi_sense_length;
 412         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 413         int                     alua_nonop_delay;
 414         /* See include/linux/dma-mapping.h */
 415         enum dma_data_direction data_direction;
 416         /* For SAM Task Attribute */
 417         int                     sam_task_attr;
 418         /* Transport protocol dependent state, see transport_state_table */
 419         enum transport_state_table t_state;
 420         unsigned                cmd_wait_set:1;
 421         unsigned                unknown_data_length:1;
 422         /* See se_cmd_flags_table */
 423         u32                     se_cmd_flags;
 424         u32                     se_ordered_id;
 425         /* Total size in bytes associated with command */
 426         u32                     data_length;
 427         u32                     residual_count;
 428         u32                     orig_fe_lun;
 429         /* Persistent Reservation key */
 430         u64                     pr_res_key;
 431         /* Used for sense data */
 432         void                    *sense_buffer;
 433         struct list_head        se_delayed_node;
 434         struct list_head        se_lun_node;
 435         struct list_head        se_qf_node;
 436         struct se_device      *se_dev;
 437         struct se_dev_entry   *se_deve;
 438         struct se_lun           *se_lun;
 439         /* Only used for internal passthrough and legacy TCM fabric modules */
 440         struct se_session       *se_sess;
 441         struct se_tmr_req       *se_tmr_req;
 442         struct list_head        se_cmd_list;
 443         struct completion       cmd_wait_comp;
 444         struct kref             cmd_kref;
 445         struct target_core_fabric_ops *se_tfo;
 446         sense_reason_t          (*execute_cmd)(struct se_cmd *);
 447         void (*transport_complete_callback)(struct se_cmd *);
 448
 449         unsigned char           *t_task_cdb;
 450         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 451         unsigned long long      t_task_lba;
 452         unsigned int            transport_state;
 453 #define CMD_T_ABORTED           (1 << 0)
 454 #define CMD_T_ACTIVE            (1 << 1)
 455 #define CMD_T_COMPLETE          (1 << 2)
 456 #define CMD_T_SENT              (1 << 4)
 457 #define CMD_T_STOP              (1 << 5)
 458 #define CMD_T_FAILED            (1 << 6)
 459 #define CMD_T_LUN_STOP          (1 << 7)
 460 #define CMD_T_LUN_FE_STOP       (1 << 8)
 461 #define CMD_T_DEV_ACTIVE        (1 << 9)
 462 #define CMD_T_REQUEST_STOP      (1 << 10)
 463 #define CMD_T_BUSY              (1 << 11)
 464         spinlock_t              t_state_lock;
 465         struct completion       t_transport_stop_comp;
 466         struct completion       transport_lun_fe_stop_comp;
 467         struct completion       transport_lun_stop_comp;
 468
 469         struct work_struct      work;
 470
 471         struct scatterlist      *t_data_sg;
 472         unsigned int            t_data_nents;
 473         void                    *t_data_vmap;
 474         struct scatterlist      *t_bidi_data_sg;
 475         unsigned int            t_bidi_data_nents;
 476
 477         struct list_head        state_list;
 478         bool                    state_active;
 479
 480         /* old task stop completion, consider merging with some of the above */
 481         struct completion       task_stop_comp;
 482
 483         /* backend private data */
 484         void                    *priv;
 485 };
 486
 487 struct se_ua {
 488         u8                      ua_asc;
 489         u8                      ua_ascq;
 490         struct se_node_acl      *ua_nacl;
 491         struct list_head        ua_dev_list;
 492         struct list_head        ua_nacl_list;
 493 };
 494
 495 struct se_node_acl {
 496         char                    initiatorname[TRANSPORT_IQN_LEN];
 497         /* Used to signal demo mode created ACL, disabled by default */
 498         bool                    dynamic_node_acl;
 499         bool                    acl_stop:1;
 500         u32                     queue_depth;
 501         u32                     acl_index;
 502 #define MAX_ACL_TAG_SIZE 64
 503         char                    acl_tag[MAX_ACL_TAG_SIZE];
 504         u64                     num_cmds;
 505         u64                     read_bytes;
 506         u64                     write_bytes;
 507         spinlock_t              stats_lock;
 508         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 509         atomic_t                acl_pr_ref_count;
 510         struct se_dev_entry     **device_list;
 511         struct se_session       *nacl_sess;
 512         struct se_portal_group *se_tpg;
 513         spinlock_t              device_list_lock;
 514         spinlock_t              nacl_sess_lock;
 515         struct config_group     acl_group;
 516         struct config_group     acl_attrib_group;
 517         struct config_group     acl_auth_group;
 518         struct config_group     acl_param_group;
 519         struct config_group     acl_fabric_stat_group;
 520         struct config_group     *acl_default_groups[5];
 521         struct list_head        acl_list;
 522         struct list_head        acl_sess_list;
 523         struct completion       acl_free_comp;
 524         struct kref             acl_kref;
 525 };
 526
 527 struct se_session {
 528         unsigned                sess_tearing_down:1;
 529         u64                     sess_bin_isid;
 530         struct se_node_acl      *se_node_acl;
 531         struct se_portal_group *se_tpg;
 532         void                    *fabric_sess_ptr;
 533         struct list_head        sess_list;
 534         struct list_head        sess_acl_list;
 535         struct list_head        sess_cmd_list;
 536         struct list_head        sess_wait_list;
 537         spinlock_t              sess_cmd_lock;
 538         struct kref             sess_kref;
 539 };
 540
 541 struct se_device;
 542 struct se_transform_info;
 543 struct scatterlist;
 544
 545 struct se_ml_stat_grps {
 546         struct config_group     stat_group;
 547         struct config_group     scsi_auth_intr_group;
 548         struct config_group     scsi_att_intr_port_group;
 549 };
 550
 551 struct se_lun_acl {
 552         char                    initiatorname[TRANSPORT_IQN_LEN];
 553         u32                     mapped_lun;
 554         struct se_node_acl      *se_lun_nacl;
 555         struct se_lun           *se_lun;
 556         struct list_head        lacl_list;
 557         struct config_group     se_lun_group;
 558         struct se_ml_stat_grps  ml_stat_grps;
 559 };
 560
 561 struct se_dev_entry {
 562         bool                    def_pr_registered;
 563         /* See transport_lunflags_table */
 564         u32                     lun_flags;
 565         u32                     mapped_lun;
 566         u32                     total_cmds;
 567         u64                     pr_res_key;
 568         u64                     creation_time;
 569         u32                     attach_count;
 570         u64                     read_bytes;
 571         u64                     write_bytes;
 572         atomic_t                ua_count;
 573         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 574         atomic_t                pr_ref_count;
 575         struct se_lun_acl       *se_lun_acl;
 576         spinlock_t              ua_lock;
 577         struct se_lun           *se_lun;
 578         struct list_head        alua_port_list;
 579         struct list_head        ua_list;
 580 };
 581
 582 struct se_dev_attrib {
 583         int             emulate_model_alias;
 584         int             emulate_dpo;
 585         int             emulate_fua_write;
 586         int             emulate_fua_read;
 587         int             emulate_write_cache;
 588         int             emulate_ua_intlck_ctrl;
 589         int             emulate_tas;
 590         int             emulate_tpu;
 591         int             emulate_tpws;
 592         int             enforce_pr_isids;
 593         int             is_nonrot;
 594         int             emulate_rest_reord;
 595         u32             hw_block_size;
 596         u32             block_size;
 597         u32             hw_max_sectors;
 598         u32             fabric_max_sectors;
 599         u32             optimal_sectors;
 600         u32             hw_queue_depth;
 601         u32             queue_depth;
 602         u32             max_unmap_lba_count;
 603         u32             max_unmap_block_desc_count;
 604         u32             unmap_granularity;
 605         u32             unmap_granularity_alignment;
 606         u32             max_write_same_len;
 607         struct se_device *da_dev;
 608         struct config_group da_group;
 609 };
 610
 611 struct se_dev_stat_grps {
 612         struct config_group stat_group;
 613         struct config_group scsi_dev_group;
 614         struct config_group scsi_tgt_dev_group;
 615         struct config_group scsi_lu_group;
 616 };
 617
 618 struct se_device {
 619 #define SE_DEV_LINK_MAGIC                       0xfeeddeef
 620         u32                     dev_link_magic;
 621         /* RELATIVE TARGET PORT IDENTIFER Counter */
 622         u16                     dev_rpti_counter;
 623         /* Used for SAM Task Attribute ordering */
 624         u32                     dev_cur_ordered_id;
 625         u32                     dev_flags;
 626 #define DF_CONFIGURED                           0x00000001
 627 #define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
 628 #define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
 629 #define DF_USING_UDEV_PATH                      0x00000008
 630 #define DF_USING_ALIAS                          0x00000010
 631         u32                     dev_port_count;
 632         /* Physical device queue depth */
 633         u32                     queue_depth;
 634         /* Used for SPC-2 reservations enforce of ISIDs */
 635         u64                     dev_res_bin_isid;
 636         /* Pointer to transport specific device structure */
 637         u32                     dev_index;
 638         u64                     creation_time;
 639         u32                     num_resets;
 640         u64                     num_cmds;
 641         u64                     read_bytes;
 642         u64                     write_bytes;
 643         spinlock_t              stats_lock;
 644         /* Active commands on this virtual SE device */
 645         atomic_t                simple_cmds;
 646         atomic_t                dev_ordered_id;
 647         atomic_t                dev_ordered_sync;
 648         atomic_t                dev_qf_count;
 649         int                     export_count;
 650         spinlock_t              delayed_cmd_lock;
 651         spinlock_t              execute_task_lock;
 652         spinlock_t              dev_reservation_lock;
 653         unsigned int            dev_reservation_flags;
 654 #define DRF_SPC2_RESERVATIONS                   0x00000001
 655 #define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
 656         spinlock_t              se_port_lock;
 657         spinlock_t              se_tmr_lock;
 658         spinlock_t              qf_cmd_lock;
 659         /* Used for legacy SPC-2 reservationsa */
 660         struct se_node_acl      *dev_reserved_node_acl;
 661         /* Used for ALUA Logical Unit Group membership */
 662         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 663         /* Used for SPC-3 Persistent Reservations */
 664         struct t10_pr_registration *dev_pr_res_holder;
 665         struct list_head        dev_sep_list;
 666         struct list_head        dev_tmr_list;
 667         struct workqueue_struct *tmr_wq;
 668         struct work_struct      qf_work_queue;
 669         struct list_head        delayed_cmd_list;
 670         struct list_head        state_list;
 671         struct list_head        qf_cmd_list;
 672         /* Pointer to associated SE HBA */
 673         struct se_hba           *se_hba;
 674         /* T10 Inquiry and VPD WWN Information */
 675         struct t10_wwn          t10_wwn;
 676         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 677         struct t10_alua         t10_alua;
 678         /* T10 SPC-2 + SPC-3 Reservations */
 679         struct t10_reservation  t10_pr;
 680         struct se_dev_attrib    dev_attrib;
 681         struct config_group     dev_group;
 682         struct config_group     dev_pr_group;
 683         struct se_dev_stat_grps dev_stat_grps;
 684 #define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
 685         unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
 686 #define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
 687         unsigned char           udev_path[SE_UDEV_PATH_LEN];
 688         /* Pointer to template of function pointers for transport */
 689         struct se_subsystem_api *transport;
 690         /* Linked list for struct se_hba struct se_device list */
 691         struct list_head        dev_list;
 692 };
 693
 694 struct se_hba {
 695         u16                     hba_tpgt;
 696         u32                     hba_id;
 697         /* See hba_flags_table */
 698         u32                     hba_flags;
 699         /* Virtual iSCSI devices attached. */
 700         u32                     dev_count;
 701         u32                     hba_index;
 702         /* Pointer to transport specific host structure. */
 703         void                    *hba_ptr;
 704         struct list_head        hba_node;
 705         spinlock_t              device_lock;
 706         struct config_group     hba_group;
 707         struct mutex            hba_access_mutex;
 708         struct se_subsystem_api *transport;
 709 };
 710
 711 struct 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
 718 struct 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_cmd_lock;
 729         spinlock_t              lun_sep_lock;
 730         struct completion       lun_shutdown_comp;
 731         struct list_head        lun_cmd_list;
 732         struct list_head        lun_acl_list;
 733         struct se_device        *lun_se_dev;
 734         struct se_port          *lun_sep;
 735         struct config_group     lun_group;
 736         struct se_port_stat_grps port_stat_grps;
 737 };
 738
 739 struct scsi_port_stats {
 740        u64     cmd_pdus;
 741        u64     tx_data_octets;
 742        u64     rx_data_octets;
 743 };
 744
 745 struct se_port {
 746         /* RELATIVE TARGET PORT IDENTIFER */
 747         u16             sep_rtpi;
 748         int             sep_tg_pt_secondary_stat;
 749         int             sep_tg_pt_secondary_write_md;
 750         u32             sep_index;
 751         struct scsi_port_stats sep_stats;
 752         /* Used for ALUA Target Port Groups membership */
 753         atomic_t        sep_tg_pt_secondary_offline;
 754         /* Used for PR ALL_TG_PT=1 */
 755         atomic_t        sep_tg_pt_ref_cnt;
 756         spinlock_t      sep_alua_lock;
 757         struct mutex    sep_tg_pt_md_mutex;
 758         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 759         struct se_lun *sep_lun;
 760         struct se_portal_group *sep_tpg;
 761         struct list_head sep_alua_list;
 762         struct list_head sep_list;
 763 };
 764
 765 struct se_tpg_np {
 766         struct se_portal_group *tpg_np_parent;
 767         struct config_group     tpg_np_group;
 768 };
 769
 770 struct se_portal_group {
 771         /* Type of target portal group, see transport_tpg_type_table */
 772         enum transport_tpg_type_table se_tpg_type;
 773         /* Number of ACLed Initiator Nodes for this TPG */
 774         u32                     num_node_acls;
 775         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 776         atomic_t                tpg_pr_ref_count;
 777         /* Spinlock for adding/removing ACLed Nodes */
 778         spinlock_t              acl_node_lock;
 779         /* Spinlock for adding/removing sessions */
 780         spinlock_t              session_lock;
 781         spinlock_t              tpg_lun_lock;
 782         /* Pointer to $FABRIC_MOD portal group */
 783         void                    *se_tpg_fabric_ptr;
 784         struct list_head        se_tpg_node;
 785         /* linked list for initiator ACL list */
 786         struct list_head        acl_node_list;
 787         struct se_lun           **tpg_lun_list;
 788         struct se_lun           tpg_virt_lun0;
 789         /* List of TCM sessions associated wth this TPG */
 790         struct list_head        tpg_sess_list;
 791         /* Pointer to $FABRIC_MOD dependent code */
 792         struct target_core_fabric_ops *se_tpg_tfo;
 793         struct se_wwn           *se_tpg_wwn;
 794         struct config_group     tpg_group;
 795         struct config_group     *tpg_default_groups[7];
 796         struct config_group     tpg_lun_group;
 797         struct config_group     tpg_np_group;
 798         struct config_group     tpg_acl_group;
 799         struct config_group     tpg_attrib_group;
 800         struct config_group     tpg_auth_group;
 801         struct config_group     tpg_param_group;
 802 };
 803
 804 struct se_wwn {
 805         struct target_fabric_configfs *wwn_tf;
 806         struct config_group     wwn_group;
 807         struct config_group     *wwn_default_groups[2];
 808         struct config_group     fabric_stat_group;
 809 };
 810
 811 #endif /* TARGET_CORE_BASE_H */