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         "v4.0.0-rc7-ml"
  13 #define SHUTDOWN_SIGS   (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
  14
  15 /* Used by transport_generic_allocate_iovecs() */
  16 #define TRANSPORT_IOV_DATA_BUFFER               5
  17 /* Maximum Number of LUNs per Target Portal Group */
  18 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
  19 #define TRANSPORT_MAX_LUNS_PER_TPG              256
  20 /*
  21  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
  22  *
  23  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
  24  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
  25  * 16-byte CDBs by default and require an extra allocation for
  26  * 32-byte CDBs to because of legacy issues.
  27  *
  28  * Within TCM Core there are no such legacy limitiations, so we go ahead
  29  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
  30  * within all TCM Core and subsystem plugin code.
  31  */
  32 #define TCM_MAX_COMMAND_SIZE                    32
  33 /*
  34  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  35  * defined 96, but the real limit is 252 (or 260 including the header)
  36  */
  37 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
  38 /* Used by transport_send_check_condition_and_sense() */
  39 #define SPC_SENSE_KEY_OFFSET                    2
  40 #define SPC_ASC_KEY_OFFSET                      12
  41 #define SPC_ASCQ_KEY_OFFSET                     13
  42 #define TRANSPORT_IQN_LEN                       224
  43 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  44 #define LU_GROUP_NAME_BUF                       256
  45 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  46 #define TG_PT_GROUP_NAME_BUF                    256
  47 /* Used to parse VPD into struct t10_vpd */
  48 #define VPD_TMP_BUF_SIZE                        128
  49 /* Used by transport_generic_cmd_sequencer() */
  50 #define READ_BLOCK_LEN                          6
  51 #define READ_CAP_LEN                            8
  52 #define READ_POSITION_LEN                       20
  53 #define INQUIRY_LEN                             36
  54 /* Used by transport_get_inquiry_vpd_serial() */
  55 #define INQUIRY_VPD_SERIAL_LEN                  254
  56 /* Used by transport_get_inquiry_vpd_device_ident() */
  57 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  58
  59 /* struct se_hba->hba_flags */
  60 enum hba_flags_table {
  61         HBA_FLAGS_INTERNAL_USE  = 0x01,
  62         HBA_FLAGS_PSCSI_MODE    = 0x02,
  63 };
  64
  65 /* struct se_lun->lun_status */
  66 enum transport_lun_status_table {
  67         TRANSPORT_LUN_STATUS_FREE = 0,
  68         TRANSPORT_LUN_STATUS_ACTIVE = 1,
  69 };
  70
  71 /* struct se_portal_group->se_tpg_type */
  72 enum transport_tpg_type_table {
  73         TRANSPORT_TPG_TYPE_NORMAL = 0,
  74         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
  75 };
  76
  77 /* Used for generate timer flags */
  78 enum timer_flags_table {
  79         TF_RUNNING      = 0x01,
  80         TF_STOP         = 0x02,
  81 };
  82
  83 /* Special transport agnostic struct se_cmd->t_states */
  84 enum transport_state_table {
  85         TRANSPORT_NO_STATE      = 0,
  86         TRANSPORT_NEW_CMD       = 1,
  87         TRANSPORT_DEFERRED_CMD  = 2,
  88         TRANSPORT_WRITE_PENDING = 3,
  89         TRANSPORT_PROCESS_WRITE = 4,
  90         TRANSPORT_PROCESSING    = 5,
  91         TRANSPORT_COMPLETE_OK   = 6,
  92         TRANSPORT_COMPLETE_FAILURE = 7,
  93         TRANSPORT_COMPLETE_TIMEOUT = 8,
  94         TRANSPORT_PROCESS_TMR   = 9,
  95         TRANSPORT_TMR_COMPLETE  = 10,
  96         TRANSPORT_ISTATE_PROCESSING = 11,
  97         TRANSPORT_ISTATE_PROCESSED = 12,
  98         TRANSPORT_KILL          = 13,
  99         TRANSPORT_REMOVE        = 14,
 100         TRANSPORT_FREE          = 15,
 101         TRANSPORT_NEW_CMD_MAP   = 16,
 102         TRANSPORT_FREE_CMD_INTR = 17,
 103         TRANSPORT_COMPLETE_QF_WP = 18,
 104 };
 105
 106 /* Used for struct se_cmd->se_cmd_flags */
 107 enum se_cmd_flags_table {
 108         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 109         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 110         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 111         SCF_SCSI_DATA_SG_IO_CDB         = 0x00000008,
 112         SCF_SCSI_CONTROL_SG_IO_CDB      = 0x00000010,
 113         SCF_SCSI_NON_DATA_CDB           = 0x00000040,
 114         SCF_SCSI_CDB_EXCEPTION          = 0x00000080,
 115         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000100,
 116         SCF_SE_CMD_FAILED               = 0x00000400,
 117         SCF_SE_LUN_CMD                  = 0x00000800,
 118         SCF_SE_ALLOW_EOO                = 0x00001000,
 119         SCF_SENT_CHECK_CONDITION        = 0x00004000,
 120         SCF_OVERFLOW_BIT                = 0x00008000,
 121         SCF_UNDERFLOW_BIT               = 0x00010000,
 122         SCF_SENT_DELAYED_TAS            = 0x00020000,
 123         SCF_ALUA_NON_OPTIMIZED          = 0x00040000,
 124         SCF_DELAYED_CMD_FROM_SAM_ATTR   = 0x00080000,
 125         SCF_UNUSED                      = 0x00100000,
 126         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
 127         SCF_EMULATE_CDB_ASYNC           = 0x01000000,
 128         SCF_EMULATE_QUEUE_FULL          = 0x02000000,
 129 };
 130
 131 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 132 enum transport_lunflags_table {
 133         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 134         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 135         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 136         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 137 };
 138
 139 /* struct se_device->dev_status */
 140 enum transport_device_status_table {
 141         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
 142         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
 143         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
 144         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
 145         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
 146         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
 147 };
 148
 149 /*
 150  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 151  * to signal which ASC/ASCQ sense payload should be built.
 152  */
 153 enum tcm_sense_reason_table {
 154         TCM_NON_EXISTENT_LUN                    = 0x01,
 155         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
 156         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
 157         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
 158         TCM_SERVICE_CRC_ERROR                   = 0x05,
 159         TCM_SNACK_REJECTED                      = 0x06,
 160         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
 161         TCM_INVALID_CDB_FIELD                   = 0x08,
 162         TCM_INVALID_PARAMETER_LIST              = 0x09,
 163         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
 164         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
 165         TCM_WRITE_PROTECTED                     = 0x0c,
 166         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
 167         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
 168         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
 169 };
 170
 171 struct se_obj {
 172         atomic_t obj_access_count;
 173 } ____cacheline_aligned;
 174
 175 /*
 176  * Used by TCM Core internally to signal if ALUA emulation is enabled or
 177  * disabled, or running in with TCM/pSCSI passthrough mode
 178  */
 179 typedef enum {
 180         SPC_ALUA_PASSTHROUGH,
 181         SPC2_ALUA_DISABLED,
 182         SPC3_ALUA_EMULATED
 183 } t10_alua_index_t;
 184
 185 /*
 186  * Used by TCM Core internally to signal if SAM Task Attribute emulation
 187  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 188  */
 189 typedef enum {
 190         SAM_TASK_ATTR_PASSTHROUGH,
 191         SAM_TASK_ATTR_UNTAGGED,
 192         SAM_TASK_ATTR_EMULATED
 193 } t10_task_attr_index_t;
 194
 195 /*
 196  * Used for target SCSI statistics
 197  */
 198 typedef enum {
 199         SCSI_INST_INDEX,
 200         SCSI_DEVICE_INDEX,
 201         SCSI_AUTH_INTR_INDEX,
 202         SCSI_INDEX_TYPE_MAX
 203 } scsi_index_t;
 204
 205 struct se_cmd;
 206
 207 struct t10_alua {
 208         t10_alua_index_t alua_type;
 209         /* ALUA Target Port Group ID */
 210         u16     alua_tg_pt_gps_counter;
 211         u32     alua_tg_pt_gps_count;
 212         spinlock_t tg_pt_gps_lock;
 213         struct se_subsystem_dev *t10_sub_dev;
 214         /* Used for default ALUA Target Port Group */
 215         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 216         /* Used for default ALUA Target Port Group ConfigFS group */
 217         struct config_group alua_tg_pt_gps_group;
 218         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 219         struct list_head tg_pt_gps_list;
 220 } ____cacheline_aligned;
 221
 222 struct t10_alua_lu_gp {
 223         u16     lu_gp_id;
 224         int     lu_gp_valid_id;
 225         u32     lu_gp_members;
 226         atomic_t lu_gp_shutdown;
 227         atomic_t lu_gp_ref_cnt;
 228         spinlock_t lu_gp_lock;
 229         struct config_group lu_gp_group;
 230         struct list_head lu_gp_node;
 231         struct list_head lu_gp_mem_list;
 232 } ____cacheline_aligned;
 233
 234 struct t10_alua_lu_gp_member {
 235         bool lu_gp_assoc;
 236         atomic_t lu_gp_mem_ref_cnt;
 237         spinlock_t lu_gp_mem_lock;
 238         struct t10_alua_lu_gp *lu_gp;
 239         struct se_device *lu_gp_mem_dev;
 240         struct list_head lu_gp_mem_list;
 241 } ____cacheline_aligned;
 242
 243 struct t10_alua_tg_pt_gp {
 244         u16     tg_pt_gp_id;
 245         int     tg_pt_gp_valid_id;
 246         int     tg_pt_gp_alua_access_status;
 247         int     tg_pt_gp_alua_access_type;
 248         int     tg_pt_gp_nonop_delay_msecs;
 249         int     tg_pt_gp_trans_delay_msecs;
 250         int     tg_pt_gp_pref;
 251         int     tg_pt_gp_write_metadata;
 252         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 253 #define ALUA_MD_BUF_LEN                         1024
 254         u32     tg_pt_gp_md_buf_len;
 255         u32     tg_pt_gp_members;
 256         atomic_t tg_pt_gp_alua_access_state;
 257         atomic_t tg_pt_gp_ref_cnt;
 258         spinlock_t tg_pt_gp_lock;
 259         struct mutex tg_pt_gp_md_mutex;
 260         struct se_subsystem_dev *tg_pt_gp_su_dev;
 261         struct config_group tg_pt_gp_group;
 262         struct list_head tg_pt_gp_list;
 263         struct list_head tg_pt_gp_mem_list;
 264 } ____cacheline_aligned;
 265
 266 struct t10_alua_tg_pt_gp_member {
 267         bool tg_pt_gp_assoc;
 268         atomic_t tg_pt_gp_mem_ref_cnt;
 269         spinlock_t tg_pt_gp_mem_lock;
 270         struct t10_alua_tg_pt_gp *tg_pt_gp;
 271         struct se_port *tg_pt;
 272         struct list_head tg_pt_gp_mem_list;
 273 } ____cacheline_aligned;
 274
 275 struct t10_vpd {
 276         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 277         int protocol_identifier_set;
 278         u32 protocol_identifier;
 279         u32 device_identifier_code_set;
 280         u32 association;
 281         u32 device_identifier_type;
 282         struct list_head vpd_list;
 283 } ____cacheline_aligned;
 284
 285 struct t10_wwn {
 286         char vendor[8];
 287         char model[16];
 288         char revision[4];
 289         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 290         spinlock_t t10_vpd_lock;
 291         struct se_subsystem_dev *t10_sub_dev;
 292         struct config_group t10_wwn_group;
 293         struct list_head t10_vpd_list;
 294 } ____cacheline_aligned;
 295
 296
 297 /*
 298  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 299  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 300  * mode
 301  */
 302 typedef enum {
 303         SPC_PASSTHROUGH,
 304         SPC2_RESERVATIONS,
 305         SPC3_PERSISTENT_RESERVATIONS
 306 } t10_reservations_index_t;
 307
 308 struct t10_pr_registration {
 309         /* Used for fabrics that contain WWN+ISID */
 310 #define PR_REG_ISID_LEN                         16
 311         /* PR_REG_ISID_LEN + ',i,0x' */
 312 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 313         char pr_reg_isid[PR_REG_ISID_LEN];
 314         /* Used during APTPL metadata reading */
 315 #define PR_APTPL_MAX_IPORT_LEN                  256
 316         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 317         /* Used during APTPL metadata reading */
 318 #define PR_APTPL_MAX_TPORT_LEN                  256
 319         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 320         /* For writing out live meta data */
 321         unsigned char *pr_aptpl_buf;
 322         u16 pr_aptpl_rpti;
 323         u16 pr_reg_tpgt;
 324         /* Reservation effects all target ports */
 325         int pr_reg_all_tg_pt;
 326         /* Activate Persistence across Target Power Loss */
 327         int pr_reg_aptpl;
 328         int pr_res_holder;
 329         int pr_res_type;
 330         int pr_res_scope;
 331         /* Used for fabric initiator WWPNs using a ISID */
 332         bool isid_present_at_reg;
 333         u32 pr_res_mapped_lun;
 334         u32 pr_aptpl_target_lun;
 335         u32 pr_res_generation;
 336         u64 pr_reg_bin_isid;
 337         u64 pr_res_key;
 338         atomic_t pr_res_holders;
 339         struct se_node_acl *pr_reg_nacl;
 340         struct se_dev_entry *pr_reg_deve;
 341         struct se_lun *pr_reg_tg_pt_lun;
 342         struct list_head pr_reg_list;
 343         struct list_head pr_reg_abort_list;
 344         struct list_head pr_reg_aptpl_list;
 345         struct list_head pr_reg_atp_list;
 346         struct list_head pr_reg_atp_mem_list;
 347 } ____cacheline_aligned;
 348
 349 /*
 350  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 351  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 352  * core_setup_reservations()
 353  */
 354 struct t10_reservation_ops {
 355         int (*t10_reservation_check)(struct se_cmd *, u32 *);
 356         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
 357         int (*t10_pr_register)(struct se_cmd *);
 358         int (*t10_pr_clear)(struct se_cmd *);
 359 };
 360
 361 struct t10_reservation {
 362         /* Reservation effects all target ports */
 363         int pr_all_tg_pt;
 364         /* Activate Persistence across Target Power Loss enabled
 365          * for SCSI device */
 366         int pr_aptpl_active;
 367         /* Used by struct t10_reservation->pr_aptpl_buf_len */
 368 #define PR_APTPL_BUF_LEN                        8192
 369         u32 pr_aptpl_buf_len;
 370         u32 pr_generation;
 371         t10_reservations_index_t res_type;
 372         spinlock_t registration_lock;
 373         spinlock_t aptpl_reg_lock;
 374         /*
 375          * This will always be set by one individual I_T Nexus.
 376          * However with all_tg_pt=1, other I_T Nexus from the
 377          * same initiator can access PR reg/res info on a different
 378          * target port.
 379          *
 380          * There is also the 'All Registrants' case, where there is
 381          * a single *pr_res_holder of the reservation, but all
 382          * registrations are considered reservation holders.
 383          */
 384         struct se_node_acl *pr_res_holder;
 385         struct list_head registration_list;
 386         struct list_head aptpl_reg_list;
 387         struct t10_reservation_ops pr_ops;
 388 } ____cacheline_aligned;
 389
 390 struct se_queue_req {
 391         int                     state;
 392         struct se_cmd           *cmd;
 393         struct list_head        qr_list;
 394 } ____cacheline_aligned;
 395
 396 struct se_queue_obj {
 397         atomic_t                queue_cnt;
 398         spinlock_t              cmd_queue_lock;
 399         struct list_head        qobj_list;
 400         wait_queue_head_t       thread_wq;
 401 } ____cacheline_aligned;
 402
 403 struct se_task {
 404         unsigned char   task_sense;
 405         struct scatterlist *task_sg;
 406         u32             task_sg_nents;
 407         struct scatterlist *task_sg_bidi;
 408         u8              task_scsi_status;
 409         u8              task_flags;
 410         int             task_error_status;
 411         int             task_state_flags;
 412         bool            task_padded_sg;
 413         unsigned long long      task_lba;
 414         u32             task_no;
 415         u32             task_sectors;
 416         u32             task_size;
 417         enum dma_data_direction task_data_direction;
 418         struct se_cmd *task_se_cmd;
 419         struct se_device        *se_dev;
 420         struct completion       task_stop_comp;
 421         atomic_t        task_active;
 422         atomic_t        task_execute_queue;
 423         atomic_t        task_timeout;
 424         atomic_t        task_sent;
 425         atomic_t        task_stop;
 426         atomic_t        task_state_active;
 427         struct timer_list       task_timer;
 428         struct se_device *se_obj_ptr;
 429         struct list_head t_list;
 430         struct list_head t_execute_list;
 431         struct list_head t_state_list;
 432 } ____cacheline_aligned;
 433
 434 struct se_cmd {
 435         /* SAM response code being sent to initiator */
 436         u8                      scsi_status;
 437         u8                      scsi_asc;
 438         u8                      scsi_ascq;
 439         u8                      scsi_sense_reason;
 440         u16                     scsi_sense_length;
 441         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 442         int                     alua_nonop_delay;
 443         /* See include/linux/dma-mapping.h */
 444         enum dma_data_direction data_direction;
 445         /* For SAM Task Attribute */
 446         int                     sam_task_attr;
 447         /* Transport protocol dependent state, see transport_state_table */
 448         enum transport_state_table t_state;
 449         /* Transport protocol dependent state for out of order CmdSNs */
 450         int                     deferred_t_state;
 451         /* Transport specific error status */
 452         int                     transport_error_status;
 453         /* See se_cmd_flags_table */
 454         u32                     se_cmd_flags;
 455         u32                     se_ordered_id;
 456         /* Total size in bytes associated with command */
 457         u32                     data_length;
 458         /* SCSI Presented Data Transfer Length */
 459         u32                     cmd_spdtl;
 460         u32                     residual_count;
 461         u32                     orig_fe_lun;
 462         /* Persistent Reservation key */
 463         u64                     pr_res_key;
 464         atomic_t                transport_sent;
 465         /* Used for sense data */
 466         void                    *sense_buffer;
 467         struct list_head        se_delayed_node;
 468         struct list_head        se_ordered_node;
 469         struct list_head        se_lun_node;
 470         struct list_head        se_qf_node;
 471         struct se_device      *se_dev;
 472         struct se_dev_entry   *se_deve;
 473         struct se_device        *se_obj_ptr;
 474         struct se_device        *se_orig_obj_ptr;
 475         struct se_lun           *se_lun;
 476         /* Only used for internal passthrough and legacy TCM fabric modules */
 477         struct se_session       *se_sess;
 478         struct se_tmr_req       *se_tmr_req;
 479         struct list_head        se_queue_node;
 480         struct target_core_fabric_ops *se_tfo;
 481         int (*transport_emulate_cdb)(struct se_cmd *);
 482         void (*transport_split_cdb)(unsigned long long, u32, unsigned char *);
 483         void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
 484         void (*transport_complete_callback)(struct se_cmd *);
 485         int (*transport_qf_callback)(struct se_cmd *);
 486
 487         unsigned char           *t_task_cdb;
 488         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 489         unsigned long long      t_task_lba;
 490         int                     t_tasks_failed;
 491         int                     t_tasks_fua;
 492         bool                    t_tasks_bidi;
 493         u32                     t_tasks_sg_chained_no;
 494         atomic_t                t_fe_count;
 495         atomic_t                t_se_count;
 496         atomic_t                t_task_cdbs_left;
 497         atomic_t                t_task_cdbs_ex_left;
 498         atomic_t                t_task_cdbs_timeout_left;
 499         atomic_t                t_task_cdbs_sent;
 500         atomic_t                t_transport_aborted;
 501         atomic_t                t_transport_active;
 502         atomic_t                t_transport_complete;
 503         atomic_t                t_transport_queue_active;
 504         atomic_t                t_transport_sent;
 505         atomic_t                t_transport_stop;
 506         atomic_t                t_transport_timeout;
 507         atomic_t                transport_dev_active;
 508         atomic_t                transport_lun_active;
 509         atomic_t                transport_lun_fe_stop;
 510         atomic_t                transport_lun_stop;
 511         spinlock_t              t_state_lock;
 512         struct completion       t_transport_stop_comp;
 513         struct completion       transport_lun_fe_stop_comp;
 514         struct completion       transport_lun_stop_comp;
 515         struct scatterlist      *t_tasks_sg_chained;
 516
 517         /*
 518          * Used for pre-registered fabric SGL passthrough WRITE and READ
 519          * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
 520          * and other HW target mode fabric modules.
 521          */
 522         struct scatterlist      *t_task_pt_sgl;
 523         u32                     t_task_pt_sgl_num;
 524
 525         struct scatterlist      *t_data_sg;
 526         unsigned int            t_data_nents;
 527         struct scatterlist      *t_bidi_data_sg;
 528         unsigned int            t_bidi_data_nents;
 529
 530         /* Used for BIDI READ */
 531         struct list_head        t_task_list;
 532         u32                     t_task_list_num;
 533
 534 } ____cacheline_aligned;
 535
 536 struct se_tmr_req {
 537         /* Task Management function to be preformed */
 538         u8                      function;
 539         /* Task Management response to send */
 540         u8                      response;
 541         int                     call_transport;
 542         /* Reference to ITT that Task Mgmt should be preformed */
 543         u32                     ref_task_tag;
 544         /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
 545         u64                     ref_task_lun;
 546         void                    *fabric_tmr_ptr;
 547         struct se_cmd           *task_cmd;
 548         struct se_cmd           *ref_cmd;
 549         struct se_device        *tmr_dev;
 550         struct se_lun           *tmr_lun;
 551         struct list_head        tmr_list;
 552 } ____cacheline_aligned;
 553
 554 struct se_ua {
 555         u8                      ua_asc;
 556         u8                      ua_ascq;
 557         struct se_node_acl      *ua_nacl;
 558         struct list_head        ua_dev_list;
 559         struct list_head        ua_nacl_list;
 560 } ____cacheline_aligned;
 561
 562 struct se_node_acl {
 563         char                    initiatorname[TRANSPORT_IQN_LEN];
 564         /* Used to signal demo mode created ACL, disabled by default */
 565         bool                    dynamic_node_acl;
 566         u32                     queue_depth;
 567         u32                     acl_index;
 568         u64                     num_cmds;
 569         u64                     read_bytes;
 570         u64                     write_bytes;
 571         spinlock_t              stats_lock;
 572         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 573         atomic_t                acl_pr_ref_count;
 574         struct se_dev_entry     *device_list;
 575         struct se_session       *nacl_sess;
 576         struct se_portal_group *se_tpg;
 577         spinlock_t              device_list_lock;
 578         spinlock_t              nacl_sess_lock;
 579         struct config_group     acl_group;
 580         struct config_group     acl_attrib_group;
 581         struct config_group     acl_auth_group;
 582         struct config_group     acl_param_group;
 583         struct config_group     acl_fabric_stat_group;
 584         struct config_group     *acl_default_groups[5];
 585         struct list_head        acl_list;
 586         struct list_head        acl_sess_list;
 587 } ____cacheline_aligned;
 588
 589 struct se_session {
 590         u64                     sess_bin_isid;
 591         struct se_node_acl      *se_node_acl;
 592         struct se_portal_group *se_tpg;
 593         void                    *fabric_sess_ptr;
 594         struct list_head        sess_list;
 595         struct list_head        sess_acl_list;
 596 } ____cacheline_aligned;
 597
 598 struct se_device;
 599 struct se_transform_info;
 600 struct scatterlist;
 601
 602 struct se_ml_stat_grps {
 603         struct config_group     stat_group;
 604         struct config_group     scsi_auth_intr_group;
 605         struct config_group     scsi_att_intr_port_group;
 606 };
 607
 608 struct se_lun_acl {
 609         char                    initiatorname[TRANSPORT_IQN_LEN];
 610         u32                     mapped_lun;
 611         struct se_node_acl      *se_lun_nacl;
 612         struct se_lun           *se_lun;
 613         struct list_head        lacl_list;
 614         struct config_group     se_lun_group;
 615         struct se_ml_stat_grps  ml_stat_grps;
 616 }  ____cacheline_aligned;
 617
 618 struct se_dev_entry {
 619         bool                    def_pr_registered;
 620         /* See transport_lunflags_table */
 621         u32                     lun_flags;
 622         u32                     deve_cmds;
 623         u32                     mapped_lun;
 624         u32                     average_bytes;
 625         u32                     last_byte_count;
 626         u32                     total_cmds;
 627         u32                     total_bytes;
 628         u64                     pr_res_key;
 629         u64                     creation_time;
 630         u32                     attach_count;
 631         u64                     read_bytes;
 632         u64                     write_bytes;
 633         atomic_t                ua_count;
 634         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 635         atomic_t                pr_ref_count;
 636         struct se_lun_acl       *se_lun_acl;
 637         spinlock_t              ua_lock;
 638         struct se_lun           *se_lun;
 639         struct list_head        alua_port_list;
 640         struct list_head        ua_list;
 641 }  ____cacheline_aligned;
 642
 643 struct se_dev_limits {
 644         /* Max supported HW queue depth */
 645         u32             hw_queue_depth;
 646         /* Max supported virtual queue depth */
 647         u32             queue_depth;
 648         /* From include/linux/blkdev.h for the other HW/SW limits. */
 649         struct queue_limits limits;
 650 } ____cacheline_aligned;
 651
 652 struct se_dev_attrib {
 653         int             emulate_dpo;
 654         int             emulate_fua_write;
 655         int             emulate_fua_read;
 656         int             emulate_write_cache;
 657         int             emulate_ua_intlck_ctrl;
 658         int             emulate_tas;
 659         int             emulate_tpu;
 660         int             emulate_tpws;
 661         int             emulate_reservations;
 662         int             emulate_alua;
 663         int             enforce_pr_isids;
 664         int             is_nonrot;
 665         int             emulate_rest_reord;
 666         u32             hw_block_size;
 667         u32             block_size;
 668         u32             hw_max_sectors;
 669         u32             max_sectors;
 670         u32             optimal_sectors;
 671         u32             hw_queue_depth;
 672         u32             queue_depth;
 673         u32             task_timeout;
 674         u32             max_unmap_lba_count;
 675         u32             max_unmap_block_desc_count;
 676         u32             unmap_granularity;
 677         u32             unmap_granularity_alignment;
 678         struct se_subsystem_dev *da_sub_dev;
 679         struct config_group da_group;
 680 } ____cacheline_aligned;
 681
 682 struct se_dev_stat_grps {
 683         struct config_group stat_group;
 684         struct config_group scsi_dev_group;
 685         struct config_group scsi_tgt_dev_group;
 686         struct config_group scsi_lu_group;
 687 };
 688
 689 struct se_subsystem_dev {
 690 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
 691 #define SE_DEV_ALIAS_LEN                512
 692         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
 693 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
 694 #define SE_UDEV_PATH_LEN                512
 695         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
 696         u32             su_dev_flags;
 697         struct se_hba *se_dev_hba;
 698         struct se_device *se_dev_ptr;
 699         struct se_dev_attrib se_dev_attrib;
 700         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 701         struct t10_alua t10_alua;
 702         /* T10 Inquiry and VPD WWN Information */
 703         struct t10_wwn  t10_wwn;
 704         /* T10 SPC-2 + SPC-3 Reservations */
 705         struct t10_reservation t10_pr;
 706         spinlock_t      se_dev_lock;
 707         void            *se_dev_su_ptr;
 708         struct list_head se_dev_node;
 709         struct config_group se_dev_group;
 710         /* For T10 Reservations */
 711         struct config_group se_dev_pr_group;
 712         /* For target_core_stat.c groups */
 713         struct se_dev_stat_grps dev_stat_grps;
 714 } ____cacheline_aligned;
 715
 716 struct se_device {
 717         /* Set to 1 if thread is NOT sleeping on thread_sem */
 718         u8                      thread_active;
 719         u8                      dev_status_timer_flags;
 720         /* RELATIVE TARGET PORT IDENTIFER Counter */
 721         u16                     dev_rpti_counter;
 722         /* Used for SAM Task Attribute ordering */
 723         u32                     dev_cur_ordered_id;
 724         u32                     dev_flags;
 725         u32                     dev_port_count;
 726         /* See transport_device_status_table */
 727         u32                     dev_status;
 728         u32                     dev_tcq_window_closed;
 729         /* Physical device queue depth */
 730         u32                     queue_depth;
 731         /* Used for SPC-2 reservations enforce of ISIDs */
 732         u64                     dev_res_bin_isid;
 733         t10_task_attr_index_t   dev_task_attr_type;
 734         /* Pointer to transport specific device structure */
 735         void                    *dev_ptr;
 736         u32                     dev_index;
 737         u64                     creation_time;
 738         u32                     num_resets;
 739         u64                     num_cmds;
 740         u64                     read_bytes;
 741         u64                     write_bytes;
 742         spinlock_t              stats_lock;
 743         /* Active commands on this virtual SE device */
 744         atomic_t                active_cmds;
 745         atomic_t                simple_cmds;
 746         atomic_t                depth_left;
 747         atomic_t                dev_ordered_id;
 748         atomic_t                dev_tur_active;
 749         atomic_t                execute_tasks;
 750         atomic_t                dev_status_thr_count;
 751         atomic_t                dev_hoq_count;
 752         atomic_t                dev_ordered_sync;
 753         atomic_t                dev_qf_count;
 754         struct se_obj           dev_obj;
 755         struct se_obj           dev_access_obj;
 756         struct se_obj           dev_export_obj;
 757         struct se_queue_obj     dev_queue_obj;
 758         spinlock_t              delayed_cmd_lock;
 759         spinlock_t              ordered_cmd_lock;
 760         spinlock_t              execute_task_lock;
 761         spinlock_t              state_task_lock;
 762         spinlock_t              dev_alua_lock;
 763         spinlock_t              dev_reservation_lock;
 764         spinlock_t              dev_state_lock;
 765         spinlock_t              dev_status_lock;
 766         spinlock_t              dev_status_thr_lock;
 767         spinlock_t              se_port_lock;
 768         spinlock_t              se_tmr_lock;
 769         spinlock_t              qf_cmd_lock;
 770         /* Used for legacy SPC-2 reservationsa */
 771         struct se_node_acl      *dev_reserved_node_acl;
 772         /* Used for ALUA Logical Unit Group membership */
 773         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 774         /* Used for SPC-3 Persistent Reservations */
 775         struct t10_pr_registration *dev_pr_res_holder;
 776         struct list_head        dev_sep_list;
 777         struct list_head        dev_tmr_list;
 778         struct timer_list       dev_status_timer;
 779         /* Pointer to descriptor for processing thread */
 780         struct task_struct      *process_thread;
 781         pid_t                   process_thread_pid;
 782         struct task_struct              *dev_mgmt_thread;
 783         struct work_struct      qf_work_queue;
 784         struct list_head        delayed_cmd_list;
 785         struct list_head        ordered_cmd_list;
 786         struct list_head        execute_task_list;
 787         struct list_head        state_task_list;
 788         struct list_head        qf_cmd_list;
 789         /* Pointer to associated SE HBA */
 790         struct se_hba           *se_hba;
 791         struct se_subsystem_dev *se_sub_dev;
 792         /* Pointer to template of function pointers for transport */
 793         struct se_subsystem_api *transport;
 794         /* Linked list for struct se_hba struct se_device list */
 795         struct list_head        dev_list;
 796         /* Linked list for struct se_global->g_se_dev_list */
 797         struct list_head        g_se_dev_list;
 798 }  ____cacheline_aligned;
 799
 800 struct se_hba {
 801         u16                     hba_tpgt;
 802         u32                     hba_id;
 803         /* See hba_flags_table */
 804         u32                     hba_flags;
 805         /* Virtual iSCSI devices attached. */
 806         u32                     dev_count;
 807         u32                     hba_index;
 808         /* Pointer to transport specific host structure. */
 809         void                    *hba_ptr;
 810         /* Linked list for struct se_device */
 811         struct list_head        hba_dev_list;
 812         struct list_head        hba_node;
 813         spinlock_t              device_lock;
 814         struct config_group     hba_group;
 815         struct mutex            hba_access_mutex;
 816         struct se_subsystem_api *transport;
 817 }  ____cacheline_aligned;
 818
 819 struct se_port_stat_grps {
 820         struct config_group stat_group;
 821         struct config_group scsi_port_group;
 822         struct config_group scsi_tgt_port_group;
 823         struct config_group scsi_transport_group;
 824 };
 825
 826 struct se_lun {
 827         /* See transport_lun_status_table */
 828         enum transport_lun_status_table lun_status;
 829         u32                     lun_access;
 830         u32                     lun_flags;
 831         u32                     unpacked_lun;
 832         atomic_t                lun_acl_count;
 833         spinlock_t              lun_acl_lock;
 834         spinlock_t              lun_cmd_lock;
 835         spinlock_t              lun_sep_lock;
 836         struct completion       lun_shutdown_comp;
 837         struct list_head        lun_cmd_list;
 838         struct list_head        lun_acl_list;
 839         struct se_device        *lun_se_dev;
 840         struct se_port          *lun_sep;
 841         struct config_group     lun_group;
 842         struct se_port_stat_grps port_stat_grps;
 843 } ____cacheline_aligned;
 844
 845 struct scsi_port_stats {
 846        u64     cmd_pdus;
 847        u64     tx_data_octets;
 848        u64     rx_data_octets;
 849 } ____cacheline_aligned;
 850
 851 struct se_port {
 852         /* RELATIVE TARGET PORT IDENTIFER */
 853         u16             sep_rtpi;
 854         int             sep_tg_pt_secondary_stat;
 855         int             sep_tg_pt_secondary_write_md;
 856         u32             sep_index;
 857         struct scsi_port_stats sep_stats;
 858         /* Used for ALUA Target Port Groups membership */
 859         atomic_t        sep_tg_pt_gp_active;
 860         atomic_t        sep_tg_pt_secondary_offline;
 861         /* Used for PR ALL_TG_PT=1 */
 862         atomic_t        sep_tg_pt_ref_cnt;
 863         spinlock_t      sep_alua_lock;
 864         struct mutex    sep_tg_pt_md_mutex;
 865         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 866         struct se_lun *sep_lun;
 867         struct se_portal_group *sep_tpg;
 868         struct list_head sep_alua_list;
 869         struct list_head sep_list;
 870 } ____cacheline_aligned;
 871
 872 struct se_tpg_np {
 873         struct se_portal_group *tpg_np_parent;
 874         struct config_group     tpg_np_group;
 875 } ____cacheline_aligned;
 876
 877 struct se_portal_group {
 878         /* Type of target portal group, see transport_tpg_type_table */
 879         enum transport_tpg_type_table se_tpg_type;
 880         /* Number of ACLed Initiator Nodes for this TPG */
 881         u32                     num_node_acls;
 882         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 883         atomic_t                tpg_pr_ref_count;
 884         /* Spinlock for adding/removing ACLed Nodes */
 885         spinlock_t              acl_node_lock;
 886         /* Spinlock for adding/removing sessions */
 887         spinlock_t              session_lock;
 888         spinlock_t              tpg_lun_lock;
 889         /* Pointer to $FABRIC_MOD portal group */
 890         void                    *se_tpg_fabric_ptr;
 891         struct list_head        se_tpg_node;
 892         /* linked list for initiator ACL list */
 893         struct list_head        acl_node_list;
 894         struct se_lun           *tpg_lun_list;
 895         struct se_lun           tpg_virt_lun0;
 896         /* List of TCM sessions associated wth this TPG */
 897         struct list_head        tpg_sess_list;
 898         /* Pointer to $FABRIC_MOD dependent code */
 899         struct target_core_fabric_ops *se_tpg_tfo;
 900         struct se_wwn           *se_tpg_wwn;
 901         struct config_group     tpg_group;
 902         struct config_group     *tpg_default_groups[6];
 903         struct config_group     tpg_lun_group;
 904         struct config_group     tpg_np_group;
 905         struct config_group     tpg_acl_group;
 906         struct config_group     tpg_attrib_group;
 907         struct config_group     tpg_param_group;
 908 } ____cacheline_aligned;
 909
 910 struct se_wwn {
 911         struct target_fabric_configfs *wwn_tf;
 912         struct config_group     wwn_group;
 913         struct config_group     *wwn_default_groups[2];
 914         struct config_group     fabric_stat_group;
 915 } ____cacheline_aligned;
 916
 917 #endif /* TARGET_CORE_BASE_H */