include/target/target_core_base.h

   1 #ifndef TARGET_CORE_BASE_H
   2 #define TARGET_CORE_BASE_H
   3
   4 #include <linux/in.h>
   5 #include <linux/configfs.h>
   6 #include <linux/dma-mapping.h>
   7 #include <linux/blkdev.h>
   8 #include <scsi/scsi_cmnd.h>
   9 #include <net/sock.h>
  10 #include <net/tcp.h>
  11
  12 #define TARGET_CORE_MOD_VERSION         "v4.1.0-rc2-ml"
  13 #define TARGET_CORE_VERSION             TARGET_CORE_MOD_VERSION
  14
  15 /* Maximum Number of LUNs per Target Portal Group */
  16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
  17 #define TRANSPORT_MAX_LUNS_PER_TPG              256
  18 /*
  19  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
  20  *
  21  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
  22  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
  23  * 16-byte CDBs by default and require an extra allocation for
  24  * 32-byte CDBs to because of legacy issues.
  25  *
  26  * Within TCM Core there are no such legacy limitiations, so we go ahead
  27  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
  28  * within all TCM Core and subsystem plugin code.
  29  */
  30 #define TCM_MAX_COMMAND_SIZE                    32
  31 /*
  32  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  33  * defined 96, but the real limit is 252 (or 260 including the header)
  34  */
  35 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
  36 /* Used by transport_send_check_condition_and_sense() */
  37 #define SPC_SENSE_KEY_OFFSET                    2
  38 #define SPC_ADD_SENSE_LEN_OFFSET                7
  39 #define SPC_ASC_KEY_OFFSET                      12
  40 #define SPC_ASCQ_KEY_OFFSET                     13
  41 #define TRANSPORT_IQN_LEN                       224
  42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  43 #define LU_GROUP_NAME_BUF                       256
  44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  45 #define TG_PT_GROUP_NAME_BUF                    256
  46 /* Used to parse VPD into struct t10_vpd */
  47 #define VPD_TMP_BUF_SIZE                        128
  48 /* Used by transport_generic_cmd_sequencer() */
  49 #define READ_BLOCK_LEN                          6
  50 #define READ_CAP_LEN                            8
  51 #define READ_POSITION_LEN                       20
  52 #define INQUIRY_LEN                             36
  53 /* Used by transport_get_inquiry_vpd_serial() */
  54 #define INQUIRY_VPD_SERIAL_LEN                  254
  55 /* Used by transport_get_inquiry_vpd_device_ident() */
  56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  57
  58 /* Attempts before moving from SHORT to LONG */
  59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
  60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
  61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  62
  63 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  64
  65 /*
  66  * struct se_subsystem_dev->su_dev_flags
  67 */
  68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL            0x00000001
  69 #define SDF_EMULATED_VPD_UNIT_SERIAL            0x00000002
  70 #define SDF_USING_UDEV_PATH                     0x00000004
  71 #define SDF_USING_ALIAS                         0x00000008
  72
  73 /*
  74  * struct se_device->dev_flags
  75  */
  76 #define DF_SPC2_RESERVATIONS                    0x00000001
  77 #define DF_SPC2_RESERVATIONS_WITH_ISID          0x00000002
  78
  79 /* struct se_dev_attrib sanity values */
  80 /* Default max_unmap_lba_count */
  81 #define DA_MAX_UNMAP_LBA_COUNT                  0
  82 /* Default max_unmap_block_desc_count */
  83 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  84 /* Default unmap_granularity */
  85 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  86 /* Default unmap_granularity_alignment */
  87 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  88 /* Default max transfer length */
  89 #define DA_FABRIC_MAX_SECTORS                   8192
  90 /* Emulation for Direct Page Out */
  91 #define DA_EMULATE_DPO                          0
  92 /* Emulation for Forced Unit Access WRITEs */
  93 #define DA_EMULATE_FUA_WRITE                    1
  94 /* Emulation for Forced Unit Access READs */
  95 #define DA_EMULATE_FUA_READ                     0
  96 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  97 #define DA_EMULATE_WRITE_CACHE                  0
  98 /* Emulation for UNIT ATTENTION Interlock Control */
  99 #define DA_EMULATE_UA_INTLLCK_CTRL              0
 100 /* Emulation for TASK_ABORTED status (TAS) by default */
 101 #define DA_EMULATE_TAS                          1
 102 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
 103 #define DA_EMULATE_TPU                          0
 104 /*
 105  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 106  * block/blk-lib.c:blkdev_issue_discard()
 107  */
 108 #define DA_EMULATE_TPWS                         0
 109 /* No Emulation for PSCSI by default */
 110 #define DA_EMULATE_RESERVATIONS                 0
 111 /* No Emulation for PSCSI by default */
 112 #define DA_EMULATE_ALUA                         0
 113 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 114 #define DA_ENFORCE_PR_ISIDS                     1
 115 #define DA_STATUS_MAX_SECTORS_MIN               16
 116 #define DA_STATUS_MAX_SECTORS_MAX               8192
 117 /* By default don't report non-rotating (solid state) medium */
 118 #define DA_IS_NONROT                            0
 119 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 120 #define DA_EMULATE_REST_REORD                   0
 121
 122 #define SE_INQUIRY_BUF                          512
 123 #define SE_MODE_PAGE_BUF                        512
 124
 125 /* struct se_hba->hba_flags */
 126 enum hba_flags_table {
 127         HBA_FLAGS_INTERNAL_USE  = 0x01,
 128         HBA_FLAGS_PSCSI_MODE    = 0x02,
 129 };
 130
 131 /* struct se_lun->lun_status */
 132 enum transport_lun_status_table {
 133         TRANSPORT_LUN_STATUS_FREE = 0,
 134         TRANSPORT_LUN_STATUS_ACTIVE = 1,
 135 };
 136
 137 /* struct se_portal_group->se_tpg_type */
 138 enum transport_tpg_type_table {
 139         TRANSPORT_TPG_TYPE_NORMAL = 0,
 140         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
 141 };
 142
 143 /* Special transport agnostic struct se_cmd->t_states */
 144 enum transport_state_table {
 145         TRANSPORT_NO_STATE      = 0,
 146         TRANSPORT_NEW_CMD       = 1,
 147         TRANSPORT_WRITE_PENDING = 3,
 148         TRANSPORT_PROCESSING    = 5,
 149         TRANSPORT_COMPLETE      = 6,
 150         TRANSPORT_ISTATE_PROCESSING = 11,
 151         TRANSPORT_COMPLETE_QF_WP = 18,
 152         TRANSPORT_COMPLETE_QF_OK = 19,
 153 };
 154
 155 /* Used for struct se_cmd->se_cmd_flags */
 156 enum se_cmd_flags_table {
 157         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 158         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 159         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 160         SCF_SCSI_DATA_CDB               = 0x00000008,
 161         SCF_SCSI_TMR_CDB                = 0x00000010,
 162         SCF_SCSI_CDB_EXCEPTION          = 0x00000020,
 163         SCF_SCSI_RESERVATION_CONFLICT   = 0x00000040,
 164         SCF_FUA                         = 0x00000080,
 165         SCF_SE_LUN_CMD                  = 0x00000100,
 166         SCF_BIDI                        = 0x00000400,
 167         SCF_SENT_CHECK_CONDITION        = 0x00000800,
 168         SCF_OVERFLOW_BIT                = 0x00001000,
 169         SCF_UNDERFLOW_BIT               = 0x00002000,
 170         SCF_SENT_DELAYED_TAS            = 0x00004000,
 171         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 172         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 173         SCF_ACK_KREF                    = 0x00040000,
 174 };
 175
 176 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 177 enum transport_lunflags_table {
 178         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 179         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 180         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 181         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 182 };
 183
 184 /* struct se_device->dev_status */
 185 enum transport_device_status_table {
 186         TRANSPORT_DEVICE_ACTIVATED              = 0x01,
 187         TRANSPORT_DEVICE_DEACTIVATED            = 0x02,
 188         TRANSPORT_DEVICE_QUEUE_FULL             = 0x04,
 189         TRANSPORT_DEVICE_SHUTDOWN               = 0x08,
 190         TRANSPORT_DEVICE_OFFLINE_ACTIVATED      = 0x10,
 191         TRANSPORT_DEVICE_OFFLINE_DEACTIVATED    = 0x20,
 192 };
 193
 194 /*
 195  * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
 196  * to signal which ASC/ASCQ sense payload should be built.
 197  */
 198 enum tcm_sense_reason_table {
 199         TCM_NON_EXISTENT_LUN                    = 0x01,
 200         TCM_UNSUPPORTED_SCSI_OPCODE             = 0x02,
 201         TCM_INCORRECT_AMOUNT_OF_DATA            = 0x03,
 202         TCM_UNEXPECTED_UNSOLICITED_DATA         = 0x04,
 203         TCM_SERVICE_CRC_ERROR                   = 0x05,
 204         TCM_SNACK_REJECTED                      = 0x06,
 205         TCM_SECTOR_COUNT_TOO_MANY               = 0x07,
 206         TCM_INVALID_CDB_FIELD                   = 0x08,
 207         TCM_INVALID_PARAMETER_LIST              = 0x09,
 208         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = 0x0a,
 209         TCM_UNKNOWN_MODE_PAGE                   = 0x0b,
 210         TCM_WRITE_PROTECTED                     = 0x0c,
 211         TCM_CHECK_CONDITION_ABORT_CMD           = 0x0d,
 212         TCM_CHECK_CONDITION_UNIT_ATTENTION      = 0x0e,
 213         TCM_CHECK_CONDITION_NOT_READY           = 0x0f,
 214         TCM_RESERVATION_CONFLICT                = 0x10,
 215         TCM_ADDRESS_OUT_OF_RANGE                = 0x11,
 216 };
 217
 218 enum target_sc_flags_table {
 219         TARGET_SCF_BIDI_OP              = 0x01,
 220         TARGET_SCF_ACK_KREF             = 0x02,
 221         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 222 };
 223
 224 /* fabric independent task management function values */
 225 enum tcm_tmreq_table {
 226         TMR_ABORT_TASK          = 1,
 227         TMR_ABORT_TASK_SET      = 2,
 228         TMR_CLEAR_ACA           = 3,
 229         TMR_CLEAR_TASK_SET      = 4,
 230         TMR_LUN_RESET           = 5,
 231         TMR_TARGET_WARM_RESET   = 6,
 232         TMR_TARGET_COLD_RESET   = 7,
 233         TMR_FABRIC_TMR          = 255,
 234 };
 235
 236 /* fabric independent task management response values */
 237 enum tcm_tmrsp_table {
 238         TMR_FUNCTION_COMPLETE           = 0,
 239         TMR_TASK_DOES_NOT_EXIST         = 1,
 240         TMR_LUN_DOES_NOT_EXIST          = 2,
 241         TMR_TASK_STILL_ALLEGIANT        = 3,
 242         TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
 243         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 5,
 244         TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
 245         TMR_FUNCTION_REJECTED           = 255,
 246 };
 247
 248 struct se_obj {
 249         atomic_t obj_access_count;
 250 };
 251
 252 /*
 253  * Used by TCM Core internally to signal if ALUA emulation is enabled or
 254  * disabled, or running in with TCM/pSCSI passthrough mode
 255  */
 256 typedef enum {
 257         SPC_ALUA_PASSTHROUGH,
 258         SPC2_ALUA_DISABLED,
 259         SPC3_ALUA_EMULATED
 260 } t10_alua_index_t;
 261
 262 /*
 263  * Used by TCM Core internally to signal if SAM Task Attribute emulation
 264  * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
 265  */
 266 typedef enum {
 267         SAM_TASK_ATTR_PASSTHROUGH,
 268         SAM_TASK_ATTR_UNTAGGED,
 269         SAM_TASK_ATTR_EMULATED
 270 } t10_task_attr_index_t;
 271
 272 /*
 273  * Used for target SCSI statistics
 274  */
 275 typedef enum {
 276         SCSI_INST_INDEX,
 277         SCSI_DEVICE_INDEX,
 278         SCSI_AUTH_INTR_INDEX,
 279         SCSI_INDEX_TYPE_MAX
 280 } scsi_index_t;
 281
 282 struct se_cmd;
 283
 284 struct t10_alua {
 285         t10_alua_index_t alua_type;
 286         /* ALUA Target Port Group ID */
 287         u16     alua_tg_pt_gps_counter;
 288         u32     alua_tg_pt_gps_count;
 289         spinlock_t tg_pt_gps_lock;
 290         struct se_subsystem_dev *t10_sub_dev;
 291         /* Used for default ALUA Target Port Group */
 292         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 293         /* Used for default ALUA Target Port Group ConfigFS group */
 294         struct config_group alua_tg_pt_gps_group;
 295         int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 296         struct list_head tg_pt_gps_list;
 297 };
 298
 299 struct t10_alua_lu_gp {
 300         u16     lu_gp_id;
 301         int     lu_gp_valid_id;
 302         u32     lu_gp_members;
 303         atomic_t lu_gp_ref_cnt;
 304         spinlock_t lu_gp_lock;
 305         struct config_group lu_gp_group;
 306         struct list_head lu_gp_node;
 307         struct list_head lu_gp_mem_list;
 308 };
 309
 310 struct t10_alua_lu_gp_member {
 311         bool lu_gp_assoc;
 312         atomic_t lu_gp_mem_ref_cnt;
 313         spinlock_t lu_gp_mem_lock;
 314         struct t10_alua_lu_gp *lu_gp;
 315         struct se_device *lu_gp_mem_dev;
 316         struct list_head lu_gp_mem_list;
 317 };
 318
 319 struct t10_alua_tg_pt_gp {
 320         u16     tg_pt_gp_id;
 321         int     tg_pt_gp_valid_id;
 322         int     tg_pt_gp_alua_access_status;
 323         int     tg_pt_gp_alua_access_type;
 324         int     tg_pt_gp_nonop_delay_msecs;
 325         int     tg_pt_gp_trans_delay_msecs;
 326         int     tg_pt_gp_implict_trans_secs;
 327         int     tg_pt_gp_pref;
 328         int     tg_pt_gp_write_metadata;
 329         /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
 330 #define ALUA_MD_BUF_LEN                         1024
 331         u32     tg_pt_gp_md_buf_len;
 332         u32     tg_pt_gp_members;
 333         atomic_t tg_pt_gp_alua_access_state;
 334         atomic_t tg_pt_gp_ref_cnt;
 335         spinlock_t tg_pt_gp_lock;
 336         struct mutex tg_pt_gp_md_mutex;
 337         struct se_subsystem_dev *tg_pt_gp_su_dev;
 338         struct config_group tg_pt_gp_group;
 339         struct list_head tg_pt_gp_list;
 340         struct list_head tg_pt_gp_mem_list;
 341 };
 342
 343 struct t10_alua_tg_pt_gp_member {
 344         bool tg_pt_gp_assoc;
 345         atomic_t tg_pt_gp_mem_ref_cnt;
 346         spinlock_t tg_pt_gp_mem_lock;
 347         struct t10_alua_tg_pt_gp *tg_pt_gp;
 348         struct se_port *tg_pt;
 349         struct list_head tg_pt_gp_mem_list;
 350 };
 351
 352 struct t10_vpd {
 353         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 354         int protocol_identifier_set;
 355         u32 protocol_identifier;
 356         u32 device_identifier_code_set;
 357         u32 association;
 358         u32 device_identifier_type;
 359         struct list_head vpd_list;
 360 };
 361
 362 struct t10_wwn {
 363         char vendor[8];
 364         char model[16];
 365         char revision[4];
 366         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 367         spinlock_t t10_vpd_lock;
 368         struct se_subsystem_dev *t10_sub_dev;
 369         struct config_group t10_wwn_group;
 370         struct list_head t10_vpd_list;
 371 };
 372
 373
 374 /*
 375  * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
 376  * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
 377  * mode
 378  */
 379 typedef enum {
 380         SPC_PASSTHROUGH,
 381         SPC2_RESERVATIONS,
 382         SPC3_PERSISTENT_RESERVATIONS
 383 } t10_reservations_index_t;
 384
 385 struct t10_pr_registration {
 386         /* Used for fabrics that contain WWN+ISID */
 387 #define PR_REG_ISID_LEN                         16
 388         /* PR_REG_ISID_LEN + ',i,0x' */
 389 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 390         char pr_reg_isid[PR_REG_ISID_LEN];
 391         /* Used during APTPL metadata reading */
 392 #define PR_APTPL_MAX_IPORT_LEN                  256
 393         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 394         /* Used during APTPL metadata reading */
 395 #define PR_APTPL_MAX_TPORT_LEN                  256
 396         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 397         /* For writing out live meta data */
 398         unsigned char *pr_aptpl_buf;
 399         u16 pr_aptpl_rpti;
 400         u16 pr_reg_tpgt;
 401         /* Reservation effects all target ports */
 402         int pr_reg_all_tg_pt;
 403         /* Activate Persistence across Target Power Loss */
 404         int pr_reg_aptpl;
 405         int pr_res_holder;
 406         int pr_res_type;
 407         int pr_res_scope;
 408         /* Used for fabric initiator WWPNs using a ISID */
 409         bool isid_present_at_reg;
 410         u32 pr_res_mapped_lun;
 411         u32 pr_aptpl_target_lun;
 412         u32 pr_res_generation;
 413         u64 pr_reg_bin_isid;
 414         u64 pr_res_key;
 415         atomic_t pr_res_holders;
 416         struct se_node_acl *pr_reg_nacl;
 417         struct se_dev_entry *pr_reg_deve;
 418         struct se_lun *pr_reg_tg_pt_lun;
 419         struct list_head pr_reg_list;
 420         struct list_head pr_reg_abort_list;
 421         struct list_head pr_reg_aptpl_list;
 422         struct list_head pr_reg_atp_list;
 423         struct list_head pr_reg_atp_mem_list;
 424 };
 425
 426 /*
 427  * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
 428  * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
 429  * core_setup_reservations()
 430  */
 431 struct t10_reservation_ops {
 432         int (*t10_reservation_check)(struct se_cmd *, u32 *);
 433         int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
 434         int (*t10_pr_register)(struct se_cmd *);
 435         int (*t10_pr_clear)(struct se_cmd *);
 436 };
 437
 438 struct t10_reservation {
 439         /* Reservation effects all target ports */
 440         int pr_all_tg_pt;
 441         /* Activate Persistence across Target Power Loss enabled
 442          * for SCSI device */
 443         int pr_aptpl_active;
 444         /* Used by struct t10_reservation->pr_aptpl_buf_len */
 445 #define PR_APTPL_BUF_LEN                        8192
 446         u32 pr_aptpl_buf_len;
 447         u32 pr_generation;
 448         t10_reservations_index_t res_type;
 449         spinlock_t registration_lock;
 450         spinlock_t aptpl_reg_lock;
 451         /*
 452          * This will always be set by one individual I_T Nexus.
 453          * However with all_tg_pt=1, other I_T Nexus from the
 454          * same initiator can access PR reg/res info on a different
 455          * target port.
 456          *
 457          * There is also the 'All Registrants' case, where there is
 458          * a single *pr_res_holder of the reservation, but all
 459          * registrations are considered reservation holders.
 460          */
 461         struct se_node_acl *pr_res_holder;
 462         struct list_head registration_list;
 463         struct list_head aptpl_reg_list;
 464         struct t10_reservation_ops pr_ops;
 465 };
 466
 467 struct se_tmr_req {
 468         /* Task Management function to be performed */
 469         u8                      function;
 470         /* Task Management response to send */
 471         u8                      response;
 472         int                     call_transport;
 473         /* Reference to ITT that Task Mgmt should be performed */
 474         u32                     ref_task_tag;
 475         void                    *fabric_tmr_ptr;
 476         struct se_cmd           *task_cmd;
 477         struct se_device        *tmr_dev;
 478         struct se_lun           *tmr_lun;
 479         struct list_head        tmr_list;
 480 };
 481
 482 struct se_cmd {
 483         /* SAM response code being sent to initiator */
 484         u8                      scsi_status;
 485         u8                      scsi_asc;
 486         u8                      scsi_ascq;
 487         u8                      scsi_sense_reason;
 488         u16                     scsi_sense_length;
 489         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 490         int                     alua_nonop_delay;
 491         /* See include/linux/dma-mapping.h */
 492         enum dma_data_direction data_direction;
 493         /* For SAM Task Attribute */
 494         int                     sam_task_attr;
 495         /* Transport protocol dependent state, see transport_state_table */
 496         enum transport_state_table t_state;
 497         /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
 498         unsigned                check_release:1;
 499         unsigned                cmd_wait_set:1;
 500         unsigned                unknown_data_length:1;
 501         /* See se_cmd_flags_table */
 502         u32                     se_cmd_flags;
 503         u32                     se_ordered_id;
 504         /* Total size in bytes associated with command */
 505         u32                     data_length;
 506         /* SCSI Presented Data Transfer Length */
 507         u32                     cmd_spdtl;
 508         u32                     residual_count;
 509         u32                     orig_fe_lun;
 510         /* Persistent Reservation key */
 511         u64                     pr_res_key;
 512         /* Used for sense data */
 513         void                    *sense_buffer;
 514         struct list_head        se_delayed_node;
 515         struct list_head        se_lun_node;
 516         struct list_head        se_qf_node;
 517         struct se_device      *se_dev;
 518         struct se_dev_entry   *se_deve;
 519         struct se_lun           *se_lun;
 520         /* Only used for internal passthrough and legacy TCM fabric modules */
 521         struct se_session       *se_sess;
 522         struct se_tmr_req       *se_tmr_req;
 523         struct list_head        se_cmd_list;
 524         struct completion       cmd_wait_comp;
 525         struct kref             cmd_kref;
 526         struct target_core_fabric_ops *se_tfo;
 527         int (*execute_cmd)(struct se_cmd *);
 528         void (*transport_complete_callback)(struct se_cmd *);
 529
 530         unsigned char           *t_task_cdb;
 531         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 532         unsigned long long      t_task_lba;
 533         atomic_t                t_fe_count;
 534         unsigned int            transport_state;
 535 #define CMD_T_ABORTED           (1 << 0)
 536 #define CMD_T_ACTIVE            (1 << 1)
 537 #define CMD_T_COMPLETE          (1 << 2)
 538 #define CMD_T_QUEUED            (1 << 3)
 539 #define CMD_T_SENT              (1 << 4)
 540 #define CMD_T_STOP              (1 << 5)
 541 #define CMD_T_FAILED            (1 << 6)
 542 #define CMD_T_LUN_STOP          (1 << 7)
 543 #define CMD_T_LUN_FE_STOP       (1 << 8)
 544 #define CMD_T_DEV_ACTIVE        (1 << 9)
 545 #define CMD_T_REQUEST_STOP      (1 << 10)
 546 #define CMD_T_BUSY              (1 << 11)
 547         spinlock_t              t_state_lock;
 548         struct completion       t_transport_stop_comp;
 549         struct completion       transport_lun_fe_stop_comp;
 550         struct completion       transport_lun_stop_comp;
 551
 552         struct work_struct      work;
 553
 554         struct scatterlist      *t_data_sg;
 555         unsigned int            t_data_nents;
 556         void                    *t_data_vmap;
 557         struct scatterlist      *t_bidi_data_sg;
 558         unsigned int            t_bidi_data_nents;
 559
 560         struct list_head        state_list;
 561         bool                    state_active;
 562
 563         /* old task stop completion, consider merging with some of the above */
 564         struct completion       task_stop_comp;
 565
 566         /* backend private data */
 567         void                    *priv;
 568 };
 569
 570 struct se_ua {
 571         u8                      ua_asc;
 572         u8                      ua_ascq;
 573         struct se_node_acl      *ua_nacl;
 574         struct list_head        ua_dev_list;
 575         struct list_head        ua_nacl_list;
 576 };
 577
 578 struct se_node_acl {
 579         char                    initiatorname[TRANSPORT_IQN_LEN];
 580         /* Used to signal demo mode created ACL, disabled by default */
 581         bool                    dynamic_node_acl;
 582         bool                    acl_stop:1;
 583         u32                     queue_depth;
 584         u32                     acl_index;
 585         u64                     num_cmds;
 586         u64                     read_bytes;
 587         u64                     write_bytes;
 588         spinlock_t              stats_lock;
 589         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 590         atomic_t                acl_pr_ref_count;
 591         struct se_dev_entry     **device_list;
 592         struct se_session       *nacl_sess;
 593         struct se_portal_group *se_tpg;
 594         spinlock_t              device_list_lock;
 595         spinlock_t              nacl_sess_lock;
 596         struct config_group     acl_group;
 597         struct config_group     acl_attrib_group;
 598         struct config_group     acl_auth_group;
 599         struct config_group     acl_param_group;
 600         struct config_group     acl_fabric_stat_group;
 601         struct config_group     *acl_default_groups[5];
 602         struct list_head        acl_list;
 603         struct list_head        acl_sess_list;
 604         struct completion       acl_free_comp;
 605         struct kref             acl_kref;
 606 };
 607
 608 struct se_session {
 609         unsigned                sess_tearing_down:1;
 610         u64                     sess_bin_isid;
 611         struct se_node_acl      *se_node_acl;
 612         struct se_portal_group *se_tpg;
 613         void                    *fabric_sess_ptr;
 614         struct list_head        sess_list;
 615         struct list_head        sess_acl_list;
 616         struct list_head        sess_cmd_list;
 617         spinlock_t              sess_cmd_lock;
 618         struct kref             sess_kref;
 619 };
 620
 621 struct se_device;
 622 struct se_transform_info;
 623 struct scatterlist;
 624
 625 struct se_ml_stat_grps {
 626         struct config_group     stat_group;
 627         struct config_group     scsi_auth_intr_group;
 628         struct config_group     scsi_att_intr_port_group;
 629 };
 630
 631 struct se_lun_acl {
 632         char                    initiatorname[TRANSPORT_IQN_LEN];
 633         u32                     mapped_lun;
 634         struct se_node_acl      *se_lun_nacl;
 635         struct se_lun           *se_lun;
 636         struct list_head        lacl_list;
 637         struct config_group     se_lun_group;
 638         struct se_ml_stat_grps  ml_stat_grps;
 639 };
 640
 641 struct se_dev_entry {
 642         bool                    def_pr_registered;
 643         /* See transport_lunflags_table */
 644         u32                     lun_flags;
 645         u32                     deve_cmds;
 646         u32                     mapped_lun;
 647         u32                     average_bytes;
 648         u32                     last_byte_count;
 649         u32                     total_cmds;
 650         u32                     total_bytes;
 651         u64                     pr_res_key;
 652         u64                     creation_time;
 653         u32                     attach_count;
 654         u64                     read_bytes;
 655         u64                     write_bytes;
 656         atomic_t                ua_count;
 657         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 658         atomic_t                pr_ref_count;
 659         struct se_lun_acl       *se_lun_acl;
 660         spinlock_t              ua_lock;
 661         struct se_lun           *se_lun;
 662         struct list_head        alua_port_list;
 663         struct list_head        ua_list;
 664 };
 665
 666 struct se_dev_limits {
 667         /* Max supported HW queue depth */
 668         u32             hw_queue_depth;
 669         /* Max supported virtual queue depth */
 670         u32             queue_depth;
 671         /* From include/linux/blkdev.h for the other HW/SW limits. */
 672         struct queue_limits limits;
 673 };
 674
 675 struct se_dev_attrib {
 676         int             emulate_dpo;
 677         int             emulate_fua_write;
 678         int             emulate_fua_read;
 679         int             emulate_write_cache;
 680         int             emulate_ua_intlck_ctrl;
 681         int             emulate_tas;
 682         int             emulate_tpu;
 683         int             emulate_tpws;
 684         int             emulate_reservations;
 685         int             emulate_alua;
 686         int             enforce_pr_isids;
 687         int             is_nonrot;
 688         int             emulate_rest_reord;
 689         u32             hw_block_size;
 690         u32             block_size;
 691         u32             hw_max_sectors;
 692         u32             fabric_max_sectors;
 693         u32             optimal_sectors;
 694         u32             hw_queue_depth;
 695         u32             queue_depth;
 696         u32             max_unmap_lba_count;
 697         u32             max_unmap_block_desc_count;
 698         u32             unmap_granularity;
 699         u32             unmap_granularity_alignment;
 700         struct se_subsystem_dev *da_sub_dev;
 701         struct config_group da_group;
 702 };
 703
 704 struct se_dev_stat_grps {
 705         struct config_group stat_group;
 706         struct config_group scsi_dev_group;
 707         struct config_group scsi_tgt_dev_group;
 708         struct config_group scsi_lu_group;
 709 };
 710
 711 struct se_subsystem_dev {
 712 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
 713 #define SE_DEV_ALIAS_LEN                512
 714         unsigned char   se_dev_alias[SE_DEV_ALIAS_LEN];
 715 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
 716 #define SE_UDEV_PATH_LEN                512
 717         unsigned char   se_dev_udev_path[SE_UDEV_PATH_LEN];
 718         u32             su_dev_flags;
 719         struct se_hba *se_dev_hba;
 720         struct se_device *se_dev_ptr;
 721         struct se_dev_attrib se_dev_attrib;
 722         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 723         struct t10_alua t10_alua;
 724         /* T10 Inquiry and VPD WWN Information */
 725         struct t10_wwn  t10_wwn;
 726         /* T10 SPC-2 + SPC-3 Reservations */
 727         struct t10_reservation t10_pr;
 728         spinlock_t      se_dev_lock;
 729         void            *se_dev_su_ptr;
 730         struct config_group se_dev_group;
 731         /* For T10 Reservations */
 732         struct config_group se_dev_pr_group;
 733         /* For target_core_stat.c groups */
 734         struct se_dev_stat_grps dev_stat_grps;
 735 };
 736
 737 struct se_device {
 738         /* RELATIVE TARGET PORT IDENTIFER Counter */
 739         u16                     dev_rpti_counter;
 740         /* Used for SAM Task Attribute ordering */
 741         u32                     dev_cur_ordered_id;
 742         u32                     dev_flags;
 743         u32                     dev_port_count;
 744         /* See transport_device_status_table */
 745         u32                     dev_status;
 746         /* Physical device queue depth */
 747         u32                     queue_depth;
 748         /* Used for SPC-2 reservations enforce of ISIDs */
 749         u64                     dev_res_bin_isid;
 750         t10_task_attr_index_t   dev_task_attr_type;
 751         /* Pointer to transport specific device structure */
 752         void                    *dev_ptr;
 753         u32                     dev_index;
 754         u64                     creation_time;
 755         u32                     num_resets;
 756         u64                     num_cmds;
 757         u64                     read_bytes;
 758         u64                     write_bytes;
 759         spinlock_t              stats_lock;
 760         /* Active commands on this virtual SE device */
 761         atomic_t                simple_cmds;
 762         atomic_t                dev_ordered_id;
 763         atomic_t                dev_ordered_sync;
 764         atomic_t                dev_qf_count;
 765         struct se_obj           dev_obj;
 766         struct se_obj           dev_access_obj;
 767         struct se_obj           dev_export_obj;
 768         spinlock_t              delayed_cmd_lock;
 769         spinlock_t              execute_task_lock;
 770         spinlock_t              dev_reservation_lock;
 771         spinlock_t              dev_status_lock;
 772         spinlock_t              se_port_lock;
 773         spinlock_t              se_tmr_lock;
 774         spinlock_t              qf_cmd_lock;
 775         /* Used for legacy SPC-2 reservationsa */
 776         struct se_node_acl      *dev_reserved_node_acl;
 777         /* Used for ALUA Logical Unit Group membership */
 778         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 779         /* Used for SPC-3 Persistent Reservations */
 780         struct t10_pr_registration *dev_pr_res_holder;
 781         struct list_head        dev_sep_list;
 782         struct list_head        dev_tmr_list;
 783         struct workqueue_struct *tmr_wq;
 784         struct work_struct      qf_work_queue;
 785         struct list_head        delayed_cmd_list;
 786         struct list_head        state_list;
 787         struct list_head        qf_cmd_list;
 788         /* Pointer to associated SE HBA */
 789         struct se_hba           *se_hba;
 790         struct se_subsystem_dev *se_sub_dev;
 791         /* Pointer to template of function pointers for transport */
 792         struct se_subsystem_api *transport;
 793         /* Linked list for struct se_hba struct se_device list */
 794         struct list_head        dev_list;
 795 };
 796
 797 struct se_hba {
 798         u16                     hba_tpgt;
 799         u32                     hba_id;
 800         /* See hba_flags_table */
 801         u32                     hba_flags;
 802         /* Virtual iSCSI devices attached. */
 803         u32                     dev_count;
 804         u32                     hba_index;
 805         /* Pointer to transport specific host structure. */
 806         void                    *hba_ptr;
 807         /* Linked list for struct se_device */
 808         struct list_head        hba_dev_list;
 809         struct list_head        hba_node;
 810         spinlock_t              device_lock;
 811         struct config_group     hba_group;
 812         struct mutex            hba_access_mutex;
 813         struct se_subsystem_api *transport;
 814 };
 815
 816 struct se_port_stat_grps {
 817         struct config_group stat_group;
 818         struct config_group scsi_port_group;
 819         struct config_group scsi_tgt_port_group;
 820         struct config_group scsi_transport_group;
 821 };
 822
 823 struct se_lun {
 824         /* See transport_lun_status_table */
 825         enum transport_lun_status_table lun_status;
 826         u32                     lun_access;
 827         u32                     lun_flags;
 828         u32                     unpacked_lun;
 829         atomic_t                lun_acl_count;
 830         spinlock_t              lun_acl_lock;
 831         spinlock_t              lun_cmd_lock;
 832         spinlock_t              lun_sep_lock;
 833         struct completion       lun_shutdown_comp;
 834         struct list_head        lun_cmd_list;
 835         struct list_head        lun_acl_list;
 836         struct se_device        *lun_se_dev;
 837         struct se_port          *lun_sep;
 838         struct config_group     lun_group;
 839         struct se_port_stat_grps port_stat_grps;
 840 };
 841
 842 struct scsi_port_stats {
 843        u64     cmd_pdus;
 844        u64     tx_data_octets;
 845        u64     rx_data_octets;
 846 };
 847
 848 struct se_port {
 849         /* RELATIVE TARGET PORT IDENTIFER */
 850         u16             sep_rtpi;
 851         int             sep_tg_pt_secondary_stat;
 852         int             sep_tg_pt_secondary_write_md;
 853         u32             sep_index;
 854         struct scsi_port_stats sep_stats;
 855         /* Used for ALUA Target Port Groups membership */
 856         atomic_t        sep_tg_pt_secondary_offline;
 857         /* Used for PR ALL_TG_PT=1 */
 858         atomic_t        sep_tg_pt_ref_cnt;
 859         spinlock_t      sep_alua_lock;
 860         struct mutex    sep_tg_pt_md_mutex;
 861         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 862         struct se_lun *sep_lun;
 863         struct se_portal_group *sep_tpg;
 864         struct list_head sep_alua_list;
 865         struct list_head sep_list;
 866 };
 867
 868 struct se_tpg_np {
 869         struct se_portal_group *tpg_np_parent;
 870         struct config_group     tpg_np_group;
 871 };
 872
 873 struct se_portal_group {
 874         /* Type of target portal group, see transport_tpg_type_table */
 875         enum transport_tpg_type_table se_tpg_type;
 876         /* Number of ACLed Initiator Nodes for this TPG */
 877         u32                     num_node_acls;
 878         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 879         atomic_t                tpg_pr_ref_count;
 880         /* Spinlock for adding/removing ACLed Nodes */
 881         spinlock_t              acl_node_lock;
 882         /* Spinlock for adding/removing sessions */
 883         spinlock_t              session_lock;
 884         spinlock_t              tpg_lun_lock;
 885         /* Pointer to $FABRIC_MOD portal group */
 886         void                    *se_tpg_fabric_ptr;
 887         struct list_head        se_tpg_node;
 888         /* linked list for initiator ACL list */
 889         struct list_head        acl_node_list;
 890         struct se_lun           **tpg_lun_list;
 891         struct se_lun           tpg_virt_lun0;
 892         /* List of TCM sessions associated wth this TPG */
 893         struct list_head        tpg_sess_list;
 894         /* Pointer to $FABRIC_MOD dependent code */
 895         struct target_core_fabric_ops *se_tpg_tfo;
 896         struct se_wwn           *se_tpg_wwn;
 897         struct config_group     tpg_group;
 898         struct config_group     *tpg_default_groups[6];
 899         struct config_group     tpg_lun_group;
 900         struct config_group     tpg_np_group;
 901         struct config_group     tpg_acl_group;
 902         struct config_group     tpg_attrib_group;
 903         struct config_group     tpg_param_group;
 904 };
 905
 906 struct se_wwn {
 907         struct target_fabric_configfs *wwn_tf;
 908         struct config_group     wwn_group;
 909         struct config_group     *wwn_default_groups[2];
 910         struct config_group     fabric_stat_group;
 911 };
 912
 913 #endif /* TARGET_CORE_BASE_H */