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
  14 /* Maximum Number of LUNs per Target Portal Group */
  15 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
  16 #define TRANSPORT_MAX_LUNS_PER_TPG              256
  17 /*
  18  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
  19  *
  20  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
  21  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
  22  * 16-byte CDBs by default and require an extra allocation for
  23  * 32-byte CDBs to because of legacy issues.
  24  *
  25  * Within TCM Core there are no such legacy limitiations, so we go ahead
  26  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
  27  * within all TCM Core and subsystem plugin code.
  28  */
  29 #define TCM_MAX_COMMAND_SIZE                    32
  30 /*
  31  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  32  * defined 96, but the real limit is 252 (or 260 including the header)
  33  */
  34 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
  35 /* Used by transport_send_check_condition_and_sense() */
  36 #define SPC_SENSE_KEY_OFFSET                    2
  37 #define SPC_ASC_KEY_OFFSET                      12
  38 #define SPC_ASCQ_KEY_OFFSET                     13
  39 #define TRANSPORT_IQN_LEN                       224
  40 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  41 #define LU_GROUP_NAME_BUF                       256
  42 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  43 #define TG_PT_GROUP_NAME_BUF                    256
  44 /* Used to parse VPD into struct t10_vpd */
  45 #define VPD_TMP_BUF_SIZE                        128
  46 /* Used by transport_generic_cmd_sequencer() */
  47 #define READ_BLOCK_LEN                          6
  48 #define READ_CAP_LEN                            8
  49 #define READ_POSITION_LEN                       20
  50 #define INQUIRY_LEN                             36
  51 /* Used by transport_get_inquiry_vpd_serial() */
  52 #define INQUIRY_VPD_SERIAL_LEN                  254
  53 /* Used by transport_get_inquiry_vpd_device_ident() */
  54 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  55
  56 /* struct se_hba->hba_flags */
  57 enum hba_flags_table {
  58         HBA_FLAGS_INTERNAL_USE  = 0x01,
  59         HBA_FLAGS_PSCSI_MODE    = 0x02,
  60 };
  61
  62 /* struct se_lun->lun_status */
  63 enum transport_lun_status_table {
  64         TRANSPORT_LUN_STATUS_FREE = 0,
  65         TRANSPORT_LUN_STATUS_ACTIVE = 1,
  66 };
  67
  68 /* struct se_portal_group->se_tpg_type */
  69 enum transport_tpg_type_table {
  70         TRANSPORT_TPG_TYPE_NORMAL = 0,
  71         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
  72 };
  73
  74 /* Used for generate timer flags */
  75 enum se_task_flags {
  76         TF_ACTIVE               = (1 << 0),
  77         TF_SENT                 = (1 << 1),
  78         TF_TIMEOUT              = (1 << 2),
  79         TF_REQUEST_STOP         = (1 << 3),
  80 };
  81
  82 /* Special transport agnostic struct se_cmd->t_states */
  83 enum transport_state_table {
  84         TRANSPORT_NO_STATE      = 0,
  85         TRANSPORT_NEW_CMD       = 1,
  86         TRANSPORT_DEFERRED_CMD  = 2,
  87         TRANSPORT_WRITE_PENDING = 3,
  88         TRANSPORT_PROCESS_WRITE = 4,
  89         TRANSPORT_PROCESSING    = 5,
  90         TRANSPORT_COMPLETE_OK   = 6,
  91         TRANSPORT_COMPLETE_FAILURE = 7,
  92         TRANSPORT_COMPLETE_TIMEOUT = 8,
  93         TRANSPORT_PROCESS_TMR   = 9,
  94         TRANSPORT_TMR_COMPLETE  = 10,
  95         TRANSPORT_ISTATE_PROCESSING = 11,
  96         TRANSPORT_ISTATE_PROCESSED = 12,
  97         TRANSPORT_KILL          = 13,
  98         TRANSPORT_FREE          = 15,
  99         TRANSPORT_NEW_CMD_MAP   = 16,
 100         TRANSPORT_FREE_CMD_INTR = 17,
 101         TRANSPORT_COMPLETE_QF_WP = 18,
 102         TRANSPORT_COMPLETE_QF_OK = 19,
 103 };
 104
 105 /* Used for struct se_cmd->se_cmd_flags */
 106 enum se_cmd_flags_table {
 107         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 108         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 109         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 110         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
 111         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
 112         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
 113         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
 114         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
 115         SCF_SE_CMD_FAILED               = 0x00000400,
 116         SCF_SE_LUN_CMD                  = 0x00000800,
 117         SCF_SE_ALLOW_EOO                = 0x00001000,
 118         SCF_SENT_CHECK_CONDITION        = 0x00004000,
 119         SCF_OVERFLOW_BIT                = 0x00008000,
 120         SCF_UNDERFLOW_BIT               = 0x00010000,
 121         SCF_SENT_DELAYED_TAS            = 0x00020000,
 122         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
 123         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
 124         SCF_UNUSED                      = 0x00100000,
 125         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
 126         SCF_EMULATE_CDB_ASYNC           = 0x01000000,
 127 };
 128
 129 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 130 enum transport_lunflags_table {
 131         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 132         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 133         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 134         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 135 };
 136
 137 /* struct se_device->dev_status */
 138 enum transport_device_status_table {
 139         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
 140         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
 141         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
 142         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
 143         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
 144         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
 145 };
 146
 147 /*
 148  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 149  * to signal which ASC/ASCQ sense payload should be built.
 150  */
 151 enum tcm_sense_reason_table {
 152         TCM_NON_EXISTENT_LUN                    = 0x01,
 153         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
 154         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
 155         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
 156         TCM_SERVICE_CRC_ERROR                   = 0x05,
 157         TCM_SNACK_REJECTED                      = 0x06,
 158         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
 159         TCM_INVALID_CDB_FIELD                   = 0x08,
 160         TCM_INVALID_PARAMETER_LIST              = 0x09,
 161         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
 162         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
 163         TCM_WRITE_PROTECTED                     = 0x0c,
 164         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
 165         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
 166         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
 167 };
 168
 169 struct se_obj {
 170         atomic_t obj_access_count;
 171 } ____cacheline_aligned;
 172
 173 /*
 174  * Used by TCM Core internally to signal if ALUA emulation is enabled or
 175  * disabled, or running in with TCM/pSCSI passthrough mode
 176  */
 177 typedef enum {
 178         SPC_ALUA_PASSTHROUGH,
 179         SPC2_ALUA_DISABLED,
 180         SPC3_ALUA_EMULATED
 181 } t10_alua_index_t;
 182
 183 /*
 184  * Used by TCM Core internally to signal if SAM Task Attribute emulation
 185  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 186  */
 187 typedef enum {
 188         SAM_TASK_ATTR_PASSTHROUGH,
 189         SAM_TASK_ATTR_UNTAGGED,
 190         SAM_TASK_ATTR_EMULATED
 191 } t10_task_attr_index_t;
 192
 193 /*
 194  * Used for target SCSI statistics
 195  */
 196 typedef enum {
 197         SCSI_INST_INDEX,
 198         SCSI_DEVICE_INDEX,
 199         SCSI_AUTH_INTR_INDEX,
 200         SCSI_INDEX_TYPE_MAX
 201 } scsi_index_t;
 202
 203 struct se_cmd;
 204
 205 struct t10_alua {
 206         t10_alua_index_t alua_type;
 207         /* ALUA Target Port Group ID */
 208         u16     alua_tg_pt_gps_counter;
 209         u32     alua_tg_pt_gps_count;
 210         spinlock_t tg_pt_gps_lock;
 211         struct se_subsystem_dev *t10_sub_dev;
 212         /* Used for default ALUA Target Port Group */
 213         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 214         /* Used for default ALUA Target Port Group ConfigFS group */
 215         struct config_group alua_tg_pt_gps_group;
 216         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 217         struct list_head tg_pt_gps_list;
 218 } ____cacheline_aligned;
 219
 220 struct t10_alua_lu_gp {
 221         u16     lu_gp_id;
 222         int     lu_gp_valid_id;
 223         u32     lu_gp_members;
 224         atomic_t lu_gp_shutdown;
 225         atomic_t lu_gp_ref_cnt;
 226         spinlock_t lu_gp_lock;
 227         struct config_group lu_gp_group;
 228         struct list_head lu_gp_node;
 229         struct list_head lu_gp_mem_list;
 230 } ____cacheline_aligned;
 231
 232 struct t10_alua_lu_gp_member {
 233         bool lu_gp_assoc;
 234         atomic_t lu_gp_mem_ref_cnt;
 235         spinlock_t lu_gp_mem_lock;
 236         struct t10_alua_lu_gp *lu_gp;
 237         struct se_device *lu_gp_mem_dev;
 238         struct list_head lu_gp_mem_list;
 239 } ____cacheline_aligned;
 240
 241 struct t10_alua_tg_pt_gp {
 242         u16     tg_pt_gp_id;
 243         int     tg_pt_gp_valid_id;
 244         int     tg_pt_gp_alua_access_status;
 245         int     tg_pt_gp_alua_access_type;
 246         int     tg_pt_gp_nonop_delay_msecs;
 247         int     tg_pt_gp_trans_delay_msecs;
 248         int     tg_pt_gp_pref;
 249         int     tg_pt_gp_write_metadata;
 250         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 251 #define ALUA_MD_BUF_LEN                         1024
 252         u32     tg_pt_gp_md_buf_len;
 253         u32     tg_pt_gp_members;
 254         atomic_t tg_pt_gp_alua_access_state;
 255         atomic_t tg_pt_gp_ref_cnt;
 256         spinlock_t tg_pt_gp_lock;
 257         struct mutex tg_pt_gp_md_mutex;
 258         struct se_subsystem_dev *tg_pt_gp_su_dev;
 259         struct config_group tg_pt_gp_group;
 260         struct list_head tg_pt_gp_list;
 261         struct list_head tg_pt_gp_mem_list;
 262 } ____cacheline_aligned;
 263
 264 struct t10_alua_tg_pt_gp_member {
 265         bool tg_pt_gp_assoc;
 266         atomic_t tg_pt_gp_mem_ref_cnt;
 267         spinlock_t tg_pt_gp_mem_lock;
 268         struct t10_alua_tg_pt_gp *tg_pt_gp;
 269         struct se_port *tg_pt;
 270         struct list_head tg_pt_gp_mem_list;
 271 } ____cacheline_aligned;
 272
 273 struct t10_vpd {
 274         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 275         int protocol_identifier_set;
 276         u32 protocol_identifier;
 277         u32 device_identifier_code_set;
 278         u32 association;
 279         u32 device_identifier_type;
 280         struct list_head vpd_list;
 281 } ____cacheline_aligned;
 282
 283 struct t10_wwn {
 284         char vendor[8];
 285         char model[16];
 286         char revision[4];
 287         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 288         spinlock_t t10_vpd_lock;
 289         struct se_subsystem_dev *t10_sub_dev;
 290         struct config_group t10_wwn_group;
 291         struct list_head t10_vpd_list;
 292 } ____cacheline_aligned;
 293
 294
 295 /*
 296  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 297  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 298  * mode
 299  */
 300 typedef enum {
 301         SPC_PASSTHROUGH,
 302         SPC2_RESERVATIONS,
 303         SPC3_PERSISTENT_RESERVATIONS
 304 } t10_reservations_index_t;
 305
 306 struct t10_pr_registration {
 307         /* Used for fabrics that contain WWN+ISID */
 308 #define PR_REG_ISID_LEN                         16
 309         /* PR_REG_ISID_LEN + ',i,0x' */
 310 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 311         char pr_reg_isid[PR_REG_ISID_LEN];
 312         /* Used during APTPL metadata reading */
 313 #define PR_APTPL_MAX_IPORT_LEN                  256
 314         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 315         /* Used during APTPL metadata reading */
 316 #define PR_APTPL_MAX_TPORT_LEN                  256
 317         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 318         /* For writing out live meta data */
 319         unsigned char *pr_aptpl_buf;
 320         u16 pr_aptpl_rpti;
 321         u16 pr_reg_tpgt;
 322         /* Reservation effects all target ports */
 323         int pr_reg_all_tg_pt;
 324         /* Activate Persistence across Target Power Loss */
 325         int pr_reg_aptpl;
 326         int pr_res_holder;
 327         int pr_res_type;
 328         int pr_res_scope;
 329         /* Used for fabric initiator WWPNs using a ISID */
 330         bool isid_present_at_reg;
 331         u32 pr_res_mapped_lun;
 332         u32 pr_aptpl_target_lun;
 333         u32 pr_res_generation;
 334         u64 pr_reg_bin_isid;
 335         u64 pr_res_key;
 336         atomic_t pr_res_holders;
 337         struct se_node_acl *pr_reg_nacl;
 338         struct se_dev_entry *pr_reg_deve;
 339         struct se_lun *pr_reg_tg_pt_lun;
 340         struct list_head pr_reg_list;
 341         struct list_head pr_reg_abort_list;
 342         struct list_head pr_reg_aptpl_list;
 343         struct list_head pr_reg_atp_list;
 344         struct list_head pr_reg_atp_mem_list;
 345 } ____cacheline_aligned;
 346
 347 /*
 348  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 349  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 350  * core_setup_reservations()
 351  */
 352 struct t10_reservation_ops {
 353         int (*t10_reservation_check)(struct se_cmd *, u32 *);
 354         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
 355         int (*t10_pr_register)(struct se_cmd *);
 356         int (*t10_pr_clear)(struct se_cmd *);
 357 };
 358
 359 struct t10_reservation {
 360         /* Reservation effects all target ports */
 361         int pr_all_tg_pt;
 362         /* Activate Persistence across Target Power Loss enabled
 363          * for SCSI device */
 364         int pr_aptpl_active;
 365         /* Used by struct t10_reservation->pr_aptpl_buf_len */
 366 #define PR_APTPL_BUF_LEN                        8192
 367         u32 pr_aptpl_buf_len;
 368         u32 pr_generation;
 369         t10_reservations_index_t res_type;
 370         spinlock_t registration_lock;
 371         spinlock_t aptpl_reg_lock;
 372         /*
 373          * This will always be set by one individual I_T Nexus.
 374          * However with all_tg_pt=1, other I_T Nexus from the
 375          * same initiator can access PR reg/res info on a different
 376          * target port.
 377          *
 378          * There is also the 'All Registrants' case, where there is
 379          * a single *pr_res_holder of the reservation, but all
 380          * registrations are considered reservation holders.
 381          */
 382         struct se_node_acl *pr_res_holder;
 383         struct list_head registration_list;
 384         struct list_head aptpl_reg_list;
 385         struct t10_reservation_ops pr_ops;
 386 } ____cacheline_aligned;
 387
 388 struct se_queue_req {
 389         int                     state;
 390         struct se_cmd           *cmd;
 391         struct list_head        qr_list;
 392 } ____cacheline_aligned;
 393
 394 struct se_queue_obj {
 395         atomic_t                queue_cnt;
 396         spinlock_t              cmd_queue_lock;
 397         struct list_head        qobj_list;
 398         wait_queue_head_t       thread_wq;
 399 } ____cacheline_aligned;
 400
 401 struct se_task {
 402         unsigned long long      task_lba;
 403         u32                     task_sectors;
 404         u32                     task_size;
 405         struct se_cmd           *task_se_cmd;
 406         struct scatterlist      *task_sg;
 407         struct scatterlist      *task_sg_bidi;
 408         u32                     task_sg_nents;
 409         u16                     task_flags;
 410         u8                      task_sense;
 411         u8                      task_scsi_status;
 412         int                     task_error_status;
 413         enum dma_data_direction task_data_direction;
 414         atomic_t                task_state_active;
 415         struct timer_list       task_timer;
 416         struct list_head        t_list;
 417         struct list_head        t_execute_list;
 418         struct list_head        t_state_list;
 419         struct completion       task_stop_comp;
 420 } ____cacheline_aligned;
 421
 422 struct se_cmd {
 423         /* SAM response code being sent to initiator */
 424         u8                      scsi_status;
 425         u8                      scsi_asc;
 426         u8                      scsi_ascq;
 427         u8                      scsi_sense_reason;
 428         u16                     scsi_sense_length;
 429         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 430         int                     alua_nonop_delay;
 431         /* See include/linux/dma-mapping.h */
 432         enum dma_data_direction data_direction;
 433         /* For SAM Task Attribute */
 434         int                     sam_task_attr;
 435         /* Transport protocol dependent state, see transport_state_table */
 436         enum transport_state_table t_state;
 437         /* Transport protocol dependent state for out of order CmdSNs */
 438         int                     deferred_t_state;
 439         /* Transport specific error status */
 440         int                     transport_error_status;
 441         /* See se_cmd_flags_table */
 442         u32                     se_cmd_flags;
 443         u32                     se_ordered_id;
 444         /* Total size in bytes associated with command */
 445         u32                     data_length;
 446         /* SCSI Presented Data Transfer Length */
 447         u32                     cmd_spdtl;
 448         u32                     residual_count;
 449         u32                     orig_fe_lun;
 450         /* Persistent Reservation key */
 451         u64                     pr_res_key;
 452         atomic_t                transport_sent;
 453         /* Used for sense data */
 454         void                    *sense_buffer;
 455         struct list_head        se_delayed_node;
 456         struct list_head        se_ordered_node;
 457         struct list_head        se_lun_node;
 458         struct list_head        se_qf_node;
 459         struct se_device      *se_dev;
 460         struct se_dev_entry   *se_deve;
 461         struct se_device        *se_obj_ptr;
 462         struct se_device        *se_orig_obj_ptr;
 463         struct se_lun           *se_lun;
 464         /* Only used for internal passthrough and legacy TCM fabric modules */
 465         struct se_session       *se_sess;
 466         struct se_tmr_req       *se_tmr_req;
 467         struct list_head        se_queue_node;
 468         struct target_core_fabric_ops *se_tfo;
 469         int (*transport_emulate_cdb)(struct se_cmd *);
 470         void (*transport_complete_callback)(struct se_cmd *);
 471
 472         unsigned char           *t_task_cdb;
 473         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 474         unsigned long long      t_task_lba;
 475         int                     t_tasks_failed;
 476         int                     t_tasks_fua;
 477         bool                    t_tasks_bidi;
 478         u32                     t_tasks_sg_chained_no;
 479         atomic_t                t_fe_count;
 480         atomic_t                t_se_count;
 481         atomic_t                t_task_cdbs_left;
 482         atomic_t                t_task_cdbs_ex_left;
 483         atomic_t                t_task_cdbs_timeout_left;
 484         atomic_t                t_task_cdbs_sent;
 485         atomic_t                t_transport_aborted;
 486         atomic_t                t_transport_active;
 487         atomic_t                t_transport_complete;
 488         atomic_t                t_transport_queue_active;
 489         atomic_t                t_transport_sent;
 490         atomic_t                t_transport_stop;
 491         atomic_t                t_transport_timeout;
 492         atomic_t                transport_dev_active;
 493         atomic_t                transport_lun_active;
 494         atomic_t                transport_lun_fe_stop;
 495         atomic_t                transport_lun_stop;
 496         spinlock_t              t_state_lock;
 497         struct completion       t_transport_stop_comp;
 498         struct completion       transport_lun_fe_stop_comp;
 499         struct completion       transport_lun_stop_comp;
 500         struct scatterlist      *t_tasks_sg_chained;
 501
 502         /*
 503          * Used for pre-registered fabric SGL passthrough WRITE and READ
 504          * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
 505          * and other HW target mode fabric modules.
 506          */
 507         struct scatterlist      *t_task_pt_sgl;
 508         u32                     t_task_pt_sgl_num;
 509
 510         struct scatterlist      *t_data_sg;
 511         unsigned int            t_data_nents;
 512         struct scatterlist      *t_bidi_data_sg;
 513         unsigned int            t_bidi_data_nents;
 514
 515         /* Used for BIDI READ */
 516         struct list_head        t_task_list;
 517         u32                     t_task_list_num;
 518
 519 } ____cacheline_aligned;
 520
 521 struct se_tmr_req {
 522         /* Task Management function to be preformed */
 523         u8                      function;
 524         /* Task Management response to send */
 525         u8                      response;
 526         int                     call_transport;
 527         /* Reference to ITT that Task Mgmt should be preformed */
 528         u32                     ref_task_tag;
 529         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
 530         u64                     ref_task_lun;
 531         void                    *fabric_tmr_ptr;
 532         struct se_cmd           *task_cmd;
 533         struct se_cmd           *ref_cmd;
 534         struct se_device        *tmr_dev;
 535         struct se_lun           *tmr_lun;
 536         struct list_head        tmr_list;
 537 } ____cacheline_aligned;
 538
 539 struct se_ua {
 540         u8                      ua_asc;
 541         u8                      ua_ascq;
 542         struct se_node_acl      *ua_nacl;
 543         struct list_head        ua_dev_list;
 544         struct list_head        ua_nacl_list;
 545 } ____cacheline_aligned;
 546
 547 struct se_node_acl {
 548         char                    initiatorname[TRANSPORT_IQN_LEN];
 549         /* Used to signal demo mode created ACL, disabled by default */
 550         bool                    dynamic_node_acl;
 551         u32                     queue_depth;
 552         u32                     acl_index;
 553         u64                     num_cmds;
 554         u64                     read_bytes;
 555         u64                     write_bytes;
 556         spinlock_t              stats_lock;
 557         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 558         atomic_t                acl_pr_ref_count;
 559         struct se_dev_entry     *device_list;
 560         struct se_session       *nacl_sess;
 561         struct se_portal_group *se_tpg;
 562         spinlock_t              device_list_lock;
 563         spinlock_t              nacl_sess_lock;
 564         struct config_group     acl_group;
 565         struct config_group     acl_attrib_group;
 566         struct config_group     acl_auth_group;
 567         struct config_group     acl_param_group;
 568         struct config_group     acl_fabric_stat_group;
 569         struct config_group     *acl_default_groups[5];
 570         struct list_head        acl_list;
 571         struct list_head        acl_sess_list;
 572 } ____cacheline_aligned;
 573
 574 struct se_session {
 575         u64                     sess_bin_isid;
 576         struct se_node_acl      *se_node_acl;
 577         struct se_portal_group *se_tpg;
 578         void                    *fabric_sess_ptr;
 579         struct list_head        sess_list;
 580         struct list_head        sess_acl_list;
 581 } ____cacheline_aligned;
 582
 583 struct se_device;
 584 struct se_transform_info;
 585 struct scatterlist;
 586
 587 struct se_ml_stat_grps {
 588         struct config_group     stat_group;
 589         struct config_group     scsi_auth_intr_group;
 590         struct config_group     scsi_att_intr_port_group;
 591 };
 592
 593 struct se_lun_acl {
 594         char                    initiatorname[TRANSPORT_IQN_LEN];
 595         u32                     mapped_lun;
 596         struct se_node_acl      *se_lun_nacl;
 597         struct se_lun           *se_lun;
 598         struct list_head        lacl_list;
 599         struct config_group     se_lun_group;
 600         struct se_ml_stat_grps  ml_stat_grps;
 601 }  ____cacheline_aligned;
 602
 603 struct se_dev_entry {
 604         bool                    def_pr_registered;
 605         /* See transport_lunflags_table */
 606         u32                     lun_flags;
 607         u32                     deve_cmds;
 608         u32                     mapped_lun;
 609         u32                     average_bytes;
 610         u32                     last_byte_count;
 611         u32                     total_cmds;
 612         u32                     total_bytes;
 613         u64                     pr_res_key;
 614         u64                     creation_time;
 615         u32                     attach_count;
 616         u64                     read_bytes;
 617         u64                     write_bytes;
 618         atomic_t                ua_count;
 619         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 620         atomic_t                pr_ref_count;
 621         struct se_lun_acl       *se_lun_acl;
 622         spinlock_t              ua_lock;
 623         struct se_lun           *se_lun;
 624         struct list_head        alua_port_list;
 625         struct list_head        ua_list;
 626 }  ____cacheline_aligned;
 627
 628 struct se_dev_limits {
 629         /* Max supported HW queue depth */
 630         u32             hw_queue_depth;
 631         /* Max supported virtual queue depth */
 632         u32             queue_depth;
 633         /* From include/linux/blkdev.h for the other HW/SW limits. */
 634         struct queue_limits limits;
 635 } ____cacheline_aligned;
 636
 637 struct se_dev_attrib {
 638         int             emulate_dpo;
 639         int             emulate_fua_write;
 640         int             emulate_fua_read;
 641         int             emulate_write_cache;
 642         int             emulate_ua_intlck_ctrl;
 643         int             emulate_tas;
 644         int             emulate_tpu;
 645         int             emulate_tpws;
 646         int             emulate_reservations;
 647         int             emulate_alua;
 648         int             enforce_pr_isids;
 649         int             is_nonrot;
 650         int             emulate_rest_reord;
 651         u32             hw_block_size;
 652         u32             block_size;
 653         u32             hw_max_sectors;
 654         u32             max_sectors;
 655         u32             optimal_sectors;
 656         u32             hw_queue_depth;
 657         u32             queue_depth;
 658         u32             task_timeout;
 659         u32             max_unmap_lba_count;
 660         u32             max_unmap_block_desc_count;
 661         u32             unmap_granularity;
 662         u32             unmap_granularity_alignment;
 663         struct se_subsystem_dev *da_sub_dev;
 664         struct config_group da_group;
 665 } ____cacheline_aligned;
 666
 667 struct se_dev_stat_grps {
 668         struct config_group stat_group;
 669         struct config_group scsi_dev_group;
 670         struct config_group scsi_tgt_dev_group;
 671         struct config_group scsi_lu_group;
 672 };
 673
 674 struct se_subsystem_dev {
 675 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
 676 #define SE_DEV_ALIAS_LEN                512
 677         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
 678 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
 679 #define SE_UDEV_PATH_LEN                512
 680         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
 681         u32             su_dev_flags;
 682         struct se_hba *se_dev_hba;
 683         struct se_device *se_dev_ptr;
 684         struct se_dev_attrib se_dev_attrib;
 685         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 686         struct t10_alua t10_alua;
 687         /* T10 Inquiry and VPD WWN Information */
 688         struct t10_wwn  t10_wwn;
 689         /* T10 SPC-2 + SPC-3 Reservations */
 690         struct t10_reservation t10_pr;
 691         spinlock_t      se_dev_lock;
 692         void            *se_dev_su_ptr;
 693         struct list_head se_dev_node;
 694         struct config_group se_dev_group;
 695         /* For T10 Reservations */
 696         struct config_group se_dev_pr_group;
 697         /* For target_core_stat.c groups */
 698         struct se_dev_stat_grps dev_stat_grps;
 699 } ____cacheline_aligned;
 700
 701 struct se_device {
 702         /* Set to 1 if thread is NOT sleeping on thread_sem */
 703         u8                      thread_active;
 704         u8                      dev_status_timer_flags;
 705         /* RELATIVE TARGET PORT IDENTIFER Counter */
 706         u16                     dev_rpti_counter;
 707         /* Used for SAM Task Attribute ordering */
 708         u32                     dev_cur_ordered_id;
 709         u32                     dev_flags;
 710         u32                     dev_port_count;
 711         /* See transport_device_status_table */
 712         u32                     dev_status;
 713         u32                     dev_tcq_window_closed;
 714         /* Physical device queue depth */
 715         u32                     queue_depth;
 716         /* Used for SPC-2 reservations enforce of ISIDs */
 717         u64                     dev_res_bin_isid;
 718         t10_task_attr_index_t   dev_task_attr_type;
 719         /* Pointer to transport specific device structure */
 720         void                    *dev_ptr;
 721         u32                     dev_index;
 722         u64                     creation_time;
 723         u32                     num_resets;
 724         u64                     num_cmds;
 725         u64                     read_bytes;
 726         u64                     write_bytes;
 727         spinlock_t              stats_lock;
 728         /* Active commands on this virtual SE device */
 729         atomic_t                active_cmds;
 730         atomic_t                simple_cmds;
 731         atomic_t                depth_left;
 732         atomic_t                dev_ordered_id;
 733         atomic_t                dev_tur_active;
 734         atomic_t                execute_tasks;
 735         atomic_t                dev_status_thr_count;
 736         atomic_t                dev_hoq_count;
 737         atomic_t                dev_ordered_sync;
 738         atomic_t                dev_qf_count;
 739         struct se_obj           dev_obj;
 740         struct se_obj           dev_access_obj;
 741         struct se_obj           dev_export_obj;
 742         struct se_queue_obj     dev_queue_obj;
 743         spinlock_t              delayed_cmd_lock;
 744         spinlock_t              ordered_cmd_lock;
 745         spinlock_t              execute_task_lock;
 746         spinlock_t              state_task_lock;
 747         spinlock_t              dev_alua_lock;
 748         spinlock_t              dev_reservation_lock;
 749         spinlock_t              dev_state_lock;
 750         spinlock_t              dev_status_lock;
 751         spinlock_t              dev_status_thr_lock;
 752         spinlock_t              se_port_lock;
 753         spinlock_t              se_tmr_lock;
 754         spinlock_t              qf_cmd_lock;
 755         /* Used for legacy SPC-2 reservationsa */
 756         struct se_node_acl      *dev_reserved_node_acl;
 757         /* Used for ALUA Logical Unit Group membership */
 758         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 759         /* Used for SPC-3 Persistent Reservations */
 760         struct t10_pr_registration *dev_pr_res_holder;
 761         struct list_head        dev_sep_list;
 762         struct list_head        dev_tmr_list;
 763         struct timer_list       dev_status_timer;
 764         /* Pointer to descriptor for processing thread */
 765         struct task_struct      *process_thread;
 766         pid_t                   process_thread_pid;
 767         struct task_struct              *dev_mgmt_thread;
 768         struct work_struct      qf_work_queue;
 769         struct list_head        delayed_cmd_list;
 770         struct list_head        ordered_cmd_list;
 771         struct list_head        execute_task_list;
 772         struct list_head        state_task_list;
 773         struct list_head        qf_cmd_list;
 774         /* Pointer to associated SE HBA */
 775         struct se_hba           *se_hba;
 776         struct se_subsystem_dev *se_sub_dev;
 777         /* Pointer to template of function pointers for transport */
 778         struct se_subsystem_api *transport;
 779         /* Linked list for struct se_hba struct se_device list */
 780         struct list_head        dev_list;
 781         /* Linked list for struct se_global->g_se_dev_list */
 782         struct list_head        g_se_dev_list;
 783 }  ____cacheline_aligned;
 784
 785 struct se_hba {
 786         u16                     hba_tpgt;
 787         u32                     hba_id;
 788         /* See hba_flags_table */
 789         u32                     hba_flags;
 790         /* Virtual iSCSI devices attached. */
 791         u32                     dev_count;
 792         u32                     hba_index;
 793         /* Pointer to transport specific host structure. */
 794         void                    *hba_ptr;
 795         /* Linked list for struct se_device */
 796         struct list_head        hba_dev_list;
 797         struct list_head        hba_node;
 798         spinlock_t              device_lock;
 799         struct config_group     hba_group;
 800         struct mutex            hba_access_mutex;
 801         struct se_subsystem_api *transport;
 802 }  ____cacheline_aligned;
 803
 804 struct se_port_stat_grps {
 805         struct config_group stat_group;
 806         struct config_group scsi_port_group;
 807         struct config_group scsi_tgt_port_group;
 808         struct config_group scsi_transport_group;
 809 };
 810
 811 struct se_lun {
 812         /* See transport_lun_status_table */
 813         enum transport_lun_status_table lun_status;
 814         u32                     lun_access;
 815         u32                     lun_flags;
 816         u32                     unpacked_lun;
 817         atomic_t                lun_acl_count;
 818         spinlock_t              lun_acl_lock;
 819         spinlock_t              lun_cmd_lock;
 820         spinlock_t              lun_sep_lock;
 821         struct completion       lun_shutdown_comp;
 822         struct list_head        lun_cmd_list;
 823         struct list_head        lun_acl_list;
 824         struct se_device        *lun_se_dev;
 825         struct se_port          *lun_sep;
 826         struct config_group     lun_group;
 827         struct se_port_stat_grps port_stat_grps;
 828 } ____cacheline_aligned;
 829
 830 struct scsi_port_stats {
 831        u64     cmd_pdus;
 832        u64     tx_data_octets;
 833        u64     rx_data_octets;
 834 } ____cacheline_aligned;
 835
 836 struct se_port {
 837         /* RELATIVE TARGET PORT IDENTIFER */
 838         u16             sep_rtpi;
 839         int             sep_tg_pt_secondary_stat;
 840         int             sep_tg_pt_secondary_write_md;
 841         u32             sep_index;
 842         struct scsi_port_stats sep_stats;
 843         /* Used for ALUA Target Port Groups membership */
 844         atomic_t        sep_tg_pt_gp_active;
 845         atomic_t        sep_tg_pt_secondary_offline;
 846         /* Used for PR ALL_TG_PT=1 */
 847         atomic_t        sep_tg_pt_ref_cnt;
 848         spinlock_t      sep_alua_lock;
 849         struct mutex    sep_tg_pt_md_mutex;
 850         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 851         struct se_lun *sep_lun;
 852         struct se_portal_group *sep_tpg;
 853         struct list_head sep_alua_list;
 854         struct list_head sep_list;
 855 } ____cacheline_aligned;
 856
 857 struct se_tpg_np {
 858         struct se_portal_group *tpg_np_parent;
 859         struct config_group     tpg_np_group;
 860 } ____cacheline_aligned;
 861
 862 struct se_portal_group {
 863         /* Type of target portal group, see transport_tpg_type_table */
 864         enum transport_tpg_type_table se_tpg_type;
 865         /* Number of ACLed Initiator Nodes for this TPG */
 866         u32                     num_node_acls;
 867         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 868         atomic_t                tpg_pr_ref_count;
 869         /* Spinlock for adding/removing ACLed Nodes */
 870         spinlock_t              acl_node_lock;
 871         /* Spinlock for adding/removing sessions */
 872         spinlock_t              session_lock;
 873         spinlock_t              tpg_lun_lock;
 874         /* Pointer to $FABRIC_MOD portal group */
 875         void                    *se_tpg_fabric_ptr;
 876         struct list_head        se_tpg_node;
 877         /* linked list for initiator ACL list */
 878         struct list_head        acl_node_list;
 879         struct se_lun           *tpg_lun_list;
 880         struct se_lun           tpg_virt_lun0;
 881         /* List of TCM sessions associated wth this TPG */
 882         struct list_head        tpg_sess_list;
 883         /* Pointer to $FABRIC_MOD dependent code */
 884         struct target_core_fabric_ops *se_tpg_tfo;
 885         struct se_wwn           *se_tpg_wwn;
 886         struct config_group     tpg_group;
 887         struct config_group     *tpg_default_groups[6];
 888         struct config_group     tpg_lun_group;
 889         struct config_group     tpg_np_group;
 890         struct config_group     tpg_acl_group;
 891         struct config_group     tpg_attrib_group;
 892         struct config_group     tpg_param_group;
 893 } ____cacheline_aligned;
 894
 895 struct se_wwn {
 896         struct target_fabric_configfs *wwn_tf;
 897         struct config_group     wwn_group;
 898         struct config_group     *wwn_default_groups[2];
 899         struct config_group     fabric_stat_group;
 900 } ____cacheline_aligned;
 901
 902 #endif /* TARGET_CORE_BASE_H */