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