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 <linux/percpu_ida.h>
   9 #include <net/sock.h>
  10 #include <net/tcp.h>
  11
  12 #define TARGET_CORE_MOD_VERSION         "v4.1.0"
  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  * Maximum size of a CDB that can be stored in se_cmd without allocating
  20  * memory dynamically for the CDB.
  21  */
  22 #define TCM_MAX_COMMAND_SIZE                    32
  23 /*
  24  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  25  * defined 96, but the real limit is 252 (or 260 including the header)
  26  */
  27 #define TRANSPORT_SENSE_BUFFER                  96
  28 /* Used by transport_send_check_condition_and_sense() */
  29 #define SPC_SENSE_KEY_OFFSET                    2
  30 #define SPC_ADD_SENSE_LEN_OFFSET                7
  31 #define SPC_DESC_TYPE_OFFSET                    8
  32 #define SPC_ADDITIONAL_DESC_LEN_OFFSET          9
  33 #define SPC_VALIDITY_OFFSET                     10
  34 #define SPC_ASC_KEY_OFFSET                      12
  35 #define SPC_ASCQ_KEY_OFFSET                     13
  36 #define TRANSPORT_IQN_LEN                       224
  37 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  38 #define LU_GROUP_NAME_BUF                       256
  39 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  40 #define TG_PT_GROUP_NAME_BUF                    256
  41 /* Used to parse VPD into struct t10_vpd */
  42 #define VPD_TMP_BUF_SIZE                        254
  43 /* Used by transport_generic_cmd_sequencer() */
  44 #define READ_BLOCK_LEN                          6
  45 #define READ_CAP_LEN                            8
  46 #define READ_POSITION_LEN                       20
  47 #define INQUIRY_LEN                             36
  48 /* Used by transport_get_inquiry_vpd_serial() */
  49 #define INQUIRY_VPD_SERIAL_LEN                  254
  50 /* Used by transport_get_inquiry_vpd_device_ident() */
  51 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  52
  53 /* Attempts before moving from SHORT to LONG */
  54 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
  55 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
  56 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  57
  58 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  59
  60 /* struct se_dev_attrib sanity values */
  61 /* Default max_unmap_lba_count */
  62 #define DA_MAX_UNMAP_LBA_COUNT                  0
  63 /* Default max_unmap_block_desc_count */
  64 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  65 /* Default unmap_granularity */
  66 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  67 /* Default unmap_granularity_alignment */
  68 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  69 /* Default max_write_same_len, disabled by default */
  70 #define DA_MAX_WRITE_SAME_LEN                   0
  71 /* Use a model alias based on the configfs backend device name */
  72 #define DA_EMULATE_MODEL_ALIAS                  0
  73 /* Emulation for Direct Page Out */
  74 #define DA_EMULATE_DPO                          0
  75 /* Emulation for Forced Unit Access WRITEs */
  76 #define DA_EMULATE_FUA_WRITE                    1
  77 /* Emulation for Forced Unit Access READs */
  78 #define DA_EMULATE_FUA_READ                     0
  79 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  80 #define DA_EMULATE_WRITE_CACHE                  0
  81 /* Emulation for UNIT ATTENTION Interlock Control */
  82 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  83 /* Emulation for TASK_ABORTED status (TAS) by default */
  84 #define DA_EMULATE_TAS                          1
  85 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  86 #define DA_EMULATE_TPU                          0
  87 /*
  88  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  89  * block/blk-lib.c:blkdev_issue_discard()
  90  */
  91 #define DA_EMULATE_TPWS                         0
  92 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
  93 #define DA_EMULATE_CAW                          1
  94 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
  95 #define DA_EMULATE_3PC                          1
  96 /* No Emulation for PSCSI by default */
  97 #define DA_EMULATE_ALUA                         0
  98 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
  99 #define DA_ENFORCE_PR_ISIDS                     1
 100 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
 101 #define DA_FORCE_PR_APTPL                       0
 102 #define DA_STATUS_MAX_SECTORS_MIN               16
 103 #define DA_STATUS_MAX_SECTORS_MAX               8192
 104 /* By default don't report non-rotating (solid state) medium */
 105 #define DA_IS_NONROT                            0
 106 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 107 #define DA_EMULATE_REST_REORD                   0
 108
 109 #define SE_INQUIRY_BUF                          1024
 110 #define SE_MODE_PAGE_BUF                        512
 111 #define SE_SENSE_BUF                            96
 112
 113 /* struct se_hba->hba_flags */
 114 enum hba_flags_table {
 115         HBA_FLAGS_INTERNAL_USE  = 0x01,
 116         HBA_FLAGS_PSCSI_MODE    = 0x02,
 117 };
 118
 119 /* struct se_lun->lun_status */
 120 enum transport_lun_status_table {
 121         TRANSPORT_LUN_STATUS_FREE = 0,
 122         TRANSPORT_LUN_STATUS_ACTIVE = 1,
 123 };
 124
 125 /* struct se_portal_group->se_tpg_type */
 126 enum transport_tpg_type_table {
 127         TRANSPORT_TPG_TYPE_NORMAL = 0,
 128         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
 129 };
 130
 131 /* Special transport agnostic struct se_cmd->t_states */
 132 enum transport_state_table {
 133         TRANSPORT_NO_STATE      = 0,
 134         TRANSPORT_NEW_CMD       = 1,
 135         TRANSPORT_WRITE_PENDING = 3,
 136         TRANSPORT_PROCESSING    = 5,
 137         TRANSPORT_COMPLETE      = 6,
 138         TRANSPORT_ISTATE_PROCESSING = 11,
 139         TRANSPORT_COMPLETE_QF_WP = 18,
 140         TRANSPORT_COMPLETE_QF_OK = 19,
 141 };
 142
 143 /* Used for struct se_cmd->se_cmd_flags */
 144 enum se_cmd_flags_table {
 145         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 146         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 147         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 148         SCF_SCSI_DATA_CDB               = 0x00000008,
 149         SCF_SCSI_TMR_CDB                = 0x00000010,
 150         SCF_FUA                         = 0x00000080,
 151         SCF_SE_LUN_CMD                  = 0x00000100,
 152         SCF_BIDI                        = 0x00000400,
 153         SCF_SENT_CHECK_CONDITION        = 0x00000800,
 154         SCF_OVERFLOW_BIT                = 0x00001000,
 155         SCF_UNDERFLOW_BIT               = 0x00002000,
 156         SCF_SEND_DELAYED_TAS            = 0x00004000,
 157         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 158         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 159         SCF_COMPARE_AND_WRITE           = 0x00080000,
 160         SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
 161 };
 162
 163 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 164 enum transport_lunflags_table {
 165         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
 166         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
 167         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
 168         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
 169 };
 170
 171 /*
 172  * Used by transport_send_check_condition_and_sense()
 173  * to signal which ASC/ASCQ sense payload should be built.
 174  */
 175 typedef unsigned __bitwise__ sense_reason_t;
 176
 177 enum tcm_sense_reason_table {
 178 #define R(x)    (__force sense_reason_t )(x)
 179         TCM_NO_SENSE                            = R(0x00),
 180         TCM_NON_EXISTENT_LUN                    = R(0x01),
 181         TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
 182         TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
 183         TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
 184         TCM_SERVICE_CRC_ERROR                   = R(0x05),
 185         TCM_SNACK_REJECTED                      = R(0x06),
 186         TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
 187         TCM_INVALID_CDB_FIELD                   = R(0x08),
 188         TCM_INVALID_PARAMETER_LIST              = R(0x09),
 189         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
 190         TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
 191         TCM_WRITE_PROTECTED                     = R(0x0c),
 192         TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
 193         TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
 194         TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
 195         TCM_RESERVATION_CONFLICT                = R(0x10),
 196         TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
 197         TCM_OUT_OF_RESOURCES                    = R(0x12),
 198         TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
 199         TCM_MISCOMPARE_VERIFY                   = R(0x14),
 200         TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
 201         TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
 202         TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
 203 #undef R
 204 };
 205
 206 enum target_sc_flags_table {
 207         TARGET_SCF_BIDI_OP              = 0x01,
 208         TARGET_SCF_ACK_KREF             = 0x02,
 209         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 210 };
 211
 212 /* fabric independent task management function values */
 213 enum tcm_tmreq_table {
 214         TMR_ABORT_TASK          = 1,
 215         TMR_ABORT_TASK_SET      = 2,
 216         TMR_CLEAR_ACA           = 3,
 217         TMR_CLEAR_TASK_SET      = 4,
 218         TMR_LUN_RESET           = 5,
 219         TMR_TARGET_WARM_RESET   = 6,
 220         TMR_TARGET_COLD_RESET   = 7,
 221 };
 222
 223 /* fabric independent task management response values */
 224 enum tcm_tmrsp_table {
 225         TMR_FUNCTION_FAILED             = 0,
 226         TMR_FUNCTION_COMPLETE           = 1,
 227         TMR_TASK_DOES_NOT_EXIST         = 2,
 228         TMR_LUN_DOES_NOT_EXIST          = 3,
 229         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
 230         TMR_FUNCTION_REJECTED           = 5,
 231 };
 232
 233 /*
 234  * Used for target SCSI statistics
 235  */
 236 typedef enum {
 237         SCSI_INST_INDEX,
 238         SCSI_DEVICE_INDEX,
 239         SCSI_AUTH_INTR_INDEX,
 240         SCSI_INDEX_TYPE_MAX
 241 } scsi_index_t;
 242
 243 struct se_cmd;
 244
 245 struct t10_alua_lba_map_member {
 246         struct list_head lba_map_mem_list;
 247         int lba_map_mem_alua_state;
 248         int lba_map_mem_alua_pg_id;
 249 };
 250
 251 struct t10_alua_lba_map {
 252         u64 lba_map_first_lba;
 253         u64 lba_map_last_lba;
 254         struct list_head lba_map_list;
 255         struct list_head lba_map_mem_list;
 256 };
 257
 258 struct t10_alua {
 259         /* ALUA Target Port Group ID */
 260         u16     alua_tg_pt_gps_counter;
 261         u32     alua_tg_pt_gps_count;
 262         /* Referrals support */
 263         spinlock_t lba_map_lock;
 264         u32     lba_map_segment_size;
 265         u32     lba_map_segment_multiplier;
 266         struct list_head lba_map_list;
 267         spinlock_t tg_pt_gps_lock;
 268         struct se_device *t10_dev;
 269         /* Used for default ALUA Target Port Group */
 270         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 271         /* Used for default ALUA Target Port Group ConfigFS group */
 272         struct config_group alua_tg_pt_gps_group;
 273         struct list_head tg_pt_gps_list;
 274 };
 275
 276 struct t10_alua_lu_gp {
 277         u16     lu_gp_id;
 278         int     lu_gp_valid_id;
 279         u32     lu_gp_members;
 280         atomic_t lu_gp_ref_cnt;
 281         spinlock_t lu_gp_lock;
 282         struct config_group lu_gp_group;
 283         struct list_head lu_gp_node;
 284         struct list_head lu_gp_mem_list;
 285 };
 286
 287 struct t10_alua_lu_gp_member {
 288         bool lu_gp_assoc;
 289         atomic_t lu_gp_mem_ref_cnt;
 290         spinlock_t lu_gp_mem_lock;
 291         struct t10_alua_lu_gp *lu_gp;
 292         struct se_device *lu_gp_mem_dev;
 293         struct list_head lu_gp_mem_list;
 294 };
 295
 296 struct t10_alua_tg_pt_gp {
 297         u16     tg_pt_gp_id;
 298         int     tg_pt_gp_valid_id;
 299         int     tg_pt_gp_alua_supported_states;
 300         int     tg_pt_gp_alua_pending_state;
 301         int     tg_pt_gp_alua_previous_state;
 302         int     tg_pt_gp_alua_access_status;
 303         int     tg_pt_gp_alua_access_type;
 304         int     tg_pt_gp_nonop_delay_msecs;
 305         int     tg_pt_gp_trans_delay_msecs;
 306         int     tg_pt_gp_implicit_trans_secs;
 307         int     tg_pt_gp_pref;
 308         int     tg_pt_gp_write_metadata;
 309         u32     tg_pt_gp_members;
 310         atomic_t tg_pt_gp_alua_access_state;
 311         atomic_t tg_pt_gp_ref_cnt;
 312         spinlock_t tg_pt_gp_lock;
 313         struct mutex tg_pt_gp_md_mutex;
 314         struct se_device *tg_pt_gp_dev;
 315         struct config_group tg_pt_gp_group;
 316         struct list_head tg_pt_gp_list;
 317         struct list_head tg_pt_gp_mem_list;
 318         struct se_port *tg_pt_gp_alua_port;
 319         struct se_node_acl *tg_pt_gp_alua_nacl;
 320         struct delayed_work tg_pt_gp_transition_work;
 321         struct completion *tg_pt_gp_transition_complete;
 322 };
 323
 324 struct t10_alua_tg_pt_gp_member {
 325         bool tg_pt_gp_assoc;
 326         atomic_t tg_pt_gp_mem_ref_cnt;
 327         spinlock_t tg_pt_gp_mem_lock;
 328         struct t10_alua_tg_pt_gp *tg_pt_gp;
 329         struct se_port *tg_pt;
 330         struct list_head tg_pt_gp_mem_list;
 331 };
 332
 333 struct t10_vpd {
 334         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 335         int protocol_identifier_set;
 336         u32 protocol_identifier;
 337         u32 device_identifier_code_set;
 338         u32 association;
 339         u32 device_identifier_type;
 340         struct list_head vpd_list;
 341 };
 342
 343 struct t10_wwn {
 344         char vendor[8];
 345         char model[16];
 346         char revision[4];
 347         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 348         spinlock_t t10_vpd_lock;
 349         struct se_device *t10_dev;
 350         struct config_group t10_wwn_group;
 351         struct list_head t10_vpd_list;
 352 };
 353
 354 struct t10_pr_registration {
 355         /* Used for fabrics that contain WWN+ISID */
 356 #define PR_REG_ISID_LEN                         16
 357         /* PR_REG_ISID_LEN + ',i,0x' */
 358 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 359         char pr_reg_isid[PR_REG_ISID_LEN];
 360         /* Used during APTPL metadata reading */
 361 #define PR_APTPL_MAX_IPORT_LEN                  256
 362         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 363         /* Used during APTPL metadata reading */
 364 #define PR_APTPL_MAX_TPORT_LEN                  256
 365         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 366         u16 pr_aptpl_rpti;
 367         u16 pr_reg_tpgt;
 368         /* Reservation effects all target ports */
 369         int pr_reg_all_tg_pt;
 370         /* Activate Persistence across Target Power Loss */
 371         int pr_reg_aptpl;
 372         int pr_res_holder;
 373         int pr_res_type;
 374         int pr_res_scope;
 375         /* Used for fabric initiator WWPNs using a ISID */
 376         bool isid_present_at_reg;
 377         u32 pr_res_mapped_lun;
 378         u32 pr_aptpl_target_lun;
 379         u32 pr_res_generation;
 380         u64 pr_reg_bin_isid;
 381         u64 pr_res_key;
 382         atomic_t pr_res_holders;
 383         struct se_node_acl *pr_reg_nacl;
 384         struct se_dev_entry *pr_reg_deve;
 385         struct se_lun *pr_reg_tg_pt_lun;
 386         struct list_head pr_reg_list;
 387         struct list_head pr_reg_abort_list;
 388         struct list_head pr_reg_aptpl_list;
 389         struct list_head pr_reg_atp_list;
 390         struct list_head pr_reg_atp_mem_list;
 391 };
 392
 393 struct t10_reservation {
 394         /* Reservation effects all target ports */
 395         int pr_all_tg_pt;
 396         /* Activate Persistence across Target Power Loss enabled
 397          * for SCSI device */
 398         int pr_aptpl_active;
 399 #define PR_APTPL_BUF_LEN                        262144
 400         u32 pr_generation;
 401         spinlock_t registration_lock;
 402         spinlock_t aptpl_reg_lock;
 403         /*
 404          * This will always be set by one individual I_T Nexus.
 405          * However with all_tg_pt=1, other I_T Nexus from the
 406          * same initiator can access PR reg/res info on a different
 407          * target port.
 408          *
 409          * There is also the 'All Registrants' case, where there is
 410          * a single *pr_res_holder of the reservation, but all
 411          * registrations are considered reservation holders.
 412          */
 413         struct se_node_acl *pr_res_holder;
 414         struct list_head registration_list;
 415         struct list_head aptpl_reg_list;
 416 };
 417
 418 struct se_tmr_req {
 419         /* Task Management function to be performed */
 420         u8                      function;
 421         /* Task Management response to send */
 422         u8                      response;
 423         int                     call_transport;
 424         /* Reference to ITT that Task Mgmt should be performed */
 425         u32                     ref_task_tag;
 426         void                    *fabric_tmr_ptr;
 427         struct se_cmd           *task_cmd;
 428         struct se_device        *tmr_dev;
 429         struct se_lun           *tmr_lun;
 430         struct list_head        tmr_list;
 431 };
 432
 433 enum target_prot_op {
 434         TARGET_PROT_NORMAL      = 0,
 435         TARGET_PROT_DIN_INSERT  = (1 << 0),
 436         TARGET_PROT_DOUT_INSERT = (1 << 1),
 437         TARGET_PROT_DIN_STRIP   = (1 << 2),
 438         TARGET_PROT_DOUT_STRIP  = (1 << 3),
 439         TARGET_PROT_DIN_PASS    = (1 << 4),
 440         TARGET_PROT_DOUT_PASS   = (1 << 5),
 441 };
 442
 443 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
 444                         TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
 445                         TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
 446
 447 enum target_prot_type {
 448         TARGET_DIF_TYPE0_PROT,
 449         TARGET_DIF_TYPE1_PROT,
 450         TARGET_DIF_TYPE2_PROT,
 451         TARGET_DIF_TYPE3_PROT,
 452 };
 453
 454 enum target_core_dif_check {
 455         TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
 456         TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
 457         TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
 458 };
 459
 460 struct se_dif_v1_tuple {
 461         __be16                  guard_tag;
 462         __be16                  app_tag;
 463         __be32                  ref_tag;
 464 };
 465
 466 /* for sam_task_attr */
 467 #define TCM_SIMPLE_TAG  0x20
 468 #define TCM_HEAD_TAG    0x21
 469 #define TCM_ORDERED_TAG 0x22
 470 #define TCM_ACA_TAG     0x24
 471
 472 struct se_cmd {
 473         /* SAM response code being sent to initiator */
 474         u8                      scsi_status;
 475         u8                      scsi_asc;
 476         u8                      scsi_ascq;
 477         u16                     scsi_sense_length;
 478         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 479         int                     alua_nonop_delay;
 480         /* See include/linux/dma-mapping.h */
 481         enum dma_data_direction data_direction;
 482         /* For SAM Task Attribute */
 483         int                     sam_task_attr;
 484         /* Used for se_sess->sess_tag_pool */
 485         unsigned int            map_tag;
 486         /* Transport protocol dependent state, see transport_state_table */
 487         enum transport_state_table t_state;
 488         unsigned                cmd_wait_set:1;
 489         unsigned                unknown_data_length:1;
 490         /* See se_cmd_flags_table */
 491         u32                     se_cmd_flags;
 492         u32                     se_ordered_id;
 493         /* Total size in bytes associated with command */
 494         u32                     data_length;
 495         u32                     residual_count;
 496         u32                     orig_fe_lun;
 497         /* Persistent Reservation key */
 498         u64                     pr_res_key;
 499         /* Used for sense data */
 500         void                    *sense_buffer;
 501         struct list_head        se_delayed_node;
 502         struct list_head        se_qf_node;
 503         struct se_device      *se_dev;
 504         struct se_dev_entry   *se_deve;
 505         struct se_lun           *se_lun;
 506         /* Only used for internal passthrough and legacy TCM fabric modules */
 507         struct se_session       *se_sess;
 508         struct se_tmr_req       *se_tmr_req;
 509         struct list_head        se_cmd_list;
 510         struct completion       cmd_wait_comp;
 511         struct kref             cmd_kref;
 512         const struct target_core_fabric_ops *se_tfo;
 513         sense_reason_t          (*execute_cmd)(struct se_cmd *);
 514         sense_reason_t          (*execute_rw)(struct se_cmd *, struct scatterlist *,
 515                                               u32, enum dma_data_direction);
 516         sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
 517
 518         unsigned char           *t_task_cdb;
 519         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 520         unsigned long long      t_task_lba;
 521         unsigned int            t_task_nolb;
 522         unsigned int            transport_state;
 523 #define CMD_T_ABORTED           (1 << 0)
 524 #define CMD_T_ACTIVE            (1 << 1)
 525 #define CMD_T_COMPLETE          (1 << 2)
 526 #define CMD_T_SENT              (1 << 4)
 527 #define CMD_T_STOP              (1 << 5)
 528 #define CMD_T_DEV_ACTIVE        (1 << 7)
 529 #define CMD_T_REQUEST_STOP      (1 << 8)
 530 #define CMD_T_BUSY              (1 << 9)
 531         spinlock_t              t_state_lock;
 532         struct completion       t_transport_stop_comp;
 533
 534         struct work_struct      work;
 535
 536         struct scatterlist      *t_data_sg;
 537         struct scatterlist      *t_data_sg_orig;
 538         unsigned int            t_data_nents;
 539         unsigned int            t_data_nents_orig;
 540         void                    *t_data_vmap;
 541         struct scatterlist      *t_bidi_data_sg;
 542         unsigned int            t_bidi_data_nents;
 543
 544         struct list_head        state_list;
 545         bool                    state_active;
 546
 547         /* old task stop completion, consider merging with some of the above */
 548         struct completion       task_stop_comp;
 549
 550         /* backend private data */
 551         void                    *priv;
 552
 553         /* Used for lun->lun_ref counting */
 554         int                     lun_ref_active;
 555
 556         /* DIF related members */
 557         enum target_prot_op     prot_op;
 558         enum target_prot_type   prot_type;
 559         u8                      prot_checks;
 560         u32                     prot_length;
 561         u32                     reftag_seed;
 562         struct scatterlist      *t_prot_sg;
 563         unsigned int            t_prot_nents;
 564         sense_reason_t          pi_err;
 565         sector_t                bad_sector;
 566         bool                    prot_pto;
 567 };
 568
 569 struct se_ua {
 570         u8                      ua_asc;
 571         u8                      ua_ascq;
 572         struct se_node_acl      *ua_nacl;
 573         struct list_head        ua_nacl_list;
 574 };
 575
 576 struct se_node_acl {
 577         char                    initiatorname[TRANSPORT_IQN_LEN];
 578         /* Used to signal demo mode created ACL, disabled by default */
 579         bool                    dynamic_node_acl;
 580         bool                    acl_stop:1;
 581         u32                     queue_depth;
 582         u32                     acl_index;
 583         enum target_prot_type   saved_prot_type;
 584 #define MAX_ACL_TAG_SIZE 64
 585         char                    acl_tag[MAX_ACL_TAG_SIZE];
 586         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 587         atomic_t                acl_pr_ref_count;
 588         struct se_dev_entry     **device_list;
 589         struct se_session       *nacl_sess;
 590         struct se_portal_group *se_tpg;
 591         spinlock_t              device_list_lock;
 592         spinlock_t              nacl_sess_lock;
 593         struct config_group     acl_group;
 594         struct config_group     acl_attrib_group;
 595         struct config_group     acl_auth_group;
 596         struct config_group     acl_param_group;
 597         struct config_group     acl_fabric_stat_group;
 598         struct config_group     *acl_default_groups[5];
 599         struct list_head        acl_list;
 600         struct list_head        acl_sess_list;
 601         struct completion       acl_free_comp;
 602         struct kref             acl_kref;
 603 };
 604
 605 struct se_session {
 606         unsigned                sess_tearing_down:1;
 607         u64                     sess_bin_isid;
 608         enum target_prot_op     sup_prot_ops;
 609         enum target_prot_type   sess_prot_type;
 610         struct se_node_acl      *se_node_acl;
 611         struct se_portal_group *se_tpg;
 612         void                    *fabric_sess_ptr;
 613         struct list_head        sess_list;
 614         struct list_head        sess_acl_list;
 615         struct list_head        sess_cmd_list;
 616         struct list_head        sess_wait_list;
 617         spinlock_t              sess_cmd_lock;
 618         struct kref             sess_kref;
 619         void                    *sess_cmd_map;
 620         struct percpu_ida       sess_tag_pool;
 621 };
 622
 623 struct se_device;
 624 struct se_transform_info;
 625 struct scatterlist;
 626
 627 struct se_ml_stat_grps {
 628         struct config_group     stat_group;
 629         struct config_group     scsi_auth_intr_group;
 630         struct config_group     scsi_att_intr_port_group;
 631 };
 632
 633 struct se_lun_acl {
 634         char                    initiatorname[TRANSPORT_IQN_LEN];
 635         u32                     mapped_lun;
 636         struct se_node_acl      *se_lun_nacl;
 637         struct se_lun           *se_lun;
 638         struct list_head        lacl_list;
 639         struct config_group     se_lun_group;
 640         struct se_ml_stat_grps  ml_stat_grps;
 641 };
 642
 643 struct se_dev_entry {
 644         bool                    def_pr_registered;
 645         /* See transport_lunflags_table */
 646         u32                     lun_flags;
 647         u32                     mapped_lun;
 648         u32                     total_cmds;
 649         u64                     pr_res_key;
 650         u64                     creation_time;
 651         u32                     attach_count;
 652         u64                     read_bytes;
 653         u64                     write_bytes;
 654         atomic_t                ua_count;
 655         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 656         atomic_t                pr_ref_count;
 657         struct se_lun_acl       *se_lun_acl;
 658         spinlock_t              ua_lock;
 659         struct se_lun           *se_lun;
 660         struct list_head        alua_port_list;
 661         struct list_head        ua_list;
 662 };
 663
 664 struct se_dev_attrib {
 665         int             emulate_model_alias;
 666         int             emulate_dpo;
 667         int             emulate_fua_write;
 668         int             emulate_fua_read;
 669         int             emulate_write_cache;
 670         int             emulate_ua_intlck_ctrl;
 671         int             emulate_tas;
 672         int             emulate_tpu;
 673         int             emulate_tpws;
 674         int             emulate_caw;
 675         int             emulate_3pc;
 676         int             pi_prot_format;
 677         enum target_prot_type pi_prot_type;
 678         enum target_prot_type hw_pi_prot_type;
 679         int             enforce_pr_isids;
 680         int             force_pr_aptpl;
 681         int             is_nonrot;
 682         int             emulate_rest_reord;
 683         u32             hw_block_size;
 684         u32             block_size;
 685         u32             hw_max_sectors;
 686         u32             optimal_sectors;
 687         u32             hw_queue_depth;
 688         u32             queue_depth;
 689         u32             max_unmap_lba_count;
 690         u32             max_unmap_block_desc_count;
 691         u32             unmap_granularity;
 692         u32             unmap_granularity_alignment;
 693         u32             max_write_same_len;
 694         u32             max_bytes_per_io;
 695         struct se_device *da_dev;
 696         struct config_group da_group;
 697 };
 698
 699 struct se_port_stat_grps {
 700         struct config_group stat_group;
 701         struct config_group scsi_port_group;
 702         struct config_group scsi_tgt_port_group;
 703         struct config_group scsi_transport_group;
 704 };
 705
 706 struct se_lun {
 707 #define SE_LUN_LINK_MAGIC                       0xffff7771
 708         u32                     lun_link_magic;
 709         /* See transport_lun_status_table */
 710         enum transport_lun_status_table lun_status;
 711         u32                     lun_access;
 712         u32                     lun_flags;
 713         u32                     unpacked_lun;
 714         atomic_t                lun_acl_count;
 715         spinlock_t              lun_acl_lock;
 716         spinlock_t              lun_sep_lock;
 717         struct completion       lun_shutdown_comp;
 718         struct list_head        lun_acl_list;
 719         struct se_device        *lun_se_dev;
 720         struct se_port          *lun_sep;
 721         struct config_group     lun_group;
 722         struct se_port_stat_grps port_stat_grps;
 723         struct completion       lun_ref_comp;
 724         struct percpu_ref       lun_ref;
 725 };
 726
 727 struct se_dev_stat_grps {
 728         struct config_group stat_group;
 729         struct config_group scsi_dev_group;
 730         struct config_group scsi_tgt_dev_group;
 731         struct config_group scsi_lu_group;
 732 };
 733
 734 struct se_device {
 735 #define SE_DEV_LINK_MAGIC                       0xfeeddeef
 736         u32                     dev_link_magic;
 737         /* RELATIVE TARGET PORT IDENTIFER Counter */
 738         u16                     dev_rpti_counter;
 739         /* Used for SAM Task Attribute ordering */
 740         u32                     dev_cur_ordered_id;
 741         u32                     dev_flags;
 742 #define DF_CONFIGURED                           0x00000001
 743 #define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
 744 #define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
 745 #define DF_USING_UDEV_PATH                      0x00000008
 746 #define DF_USING_ALIAS                          0x00000010
 747         u32                     dev_port_count;
 748         /* Physical device queue depth */
 749         u32                     queue_depth;
 750         /* Used for SPC-2 reservations enforce of ISIDs */
 751         u64                     dev_res_bin_isid;
 752         /* Pointer to transport specific device structure */
 753         u32                     dev_index;
 754         u64                     creation_time;
 755         atomic_long_t           num_resets;
 756         atomic_long_t           num_cmds;
 757         atomic_long_t           read_bytes;
 758         atomic_long_t           write_bytes;
 759         /* Active commands on this virtual SE device */
 760         atomic_t                simple_cmds;
 761         atomic_t                dev_ordered_id;
 762         atomic_t                dev_ordered_sync;
 763         atomic_t                dev_qf_count;
 764         int                     export_count;
 765         spinlock_t              delayed_cmd_lock;
 766         spinlock_t              execute_task_lock;
 767         spinlock_t              dev_reservation_lock;
 768         unsigned int            dev_reservation_flags;
 769 #define DRF_SPC2_RESERVATIONS                   0x00000001
 770 #define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
 771         spinlock_t              se_port_lock;
 772         spinlock_t              se_tmr_lock;
 773         spinlock_t              qf_cmd_lock;
 774         struct semaphore        caw_sem;
 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         struct list_head        g_dev_node;
 789         /* Pointer to associated SE HBA */
 790         struct se_hba           *se_hba;
 791         /* T10 Inquiry and VPD WWN Information */
 792         struct t10_wwn          t10_wwn;
 793         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 794         struct t10_alua         t10_alua;
 795         /* T10 SPC-2 + SPC-3 Reservations */
 796         struct t10_reservation  t10_pr;
 797         struct se_dev_attrib    dev_attrib;
 798         struct config_group     dev_group;
 799         struct config_group     dev_pr_group;
 800         struct se_dev_stat_grps dev_stat_grps;
 801 #define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
 802         unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
 803 #define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
 804         unsigned char           udev_path[SE_UDEV_PATH_LEN];
 805         /* Pointer to template of function pointers for transport */
 806         struct se_subsystem_api *transport;
 807         /* Linked list for struct se_hba struct se_device list */
 808         struct list_head        dev_list;
 809         struct se_lun           xcopy_lun;
 810         /* Protection Information */
 811         int                     prot_length;
 812 };
 813
 814 struct se_hba {
 815         u16                     hba_tpgt;
 816         u32                     hba_id;
 817         /* See hba_flags_table */
 818         u32                     hba_flags;
 819         /* Virtual iSCSI devices attached. */
 820         u32                     dev_count;
 821         u32                     hba_index;
 822         /* Pointer to transport specific host structure. */
 823         void                    *hba_ptr;
 824         struct list_head        hba_node;
 825         spinlock_t              device_lock;
 826         struct config_group     hba_group;
 827         struct mutex            hba_access_mutex;
 828         struct se_subsystem_api *transport;
 829 };
 830
 831 struct scsi_port_stats {
 832        u64     cmd_pdus;
 833        u64     tx_data_octets;
 834        u64     rx_data_octets;
 835 };
 836
 837 struct se_port {
 838         /* RELATIVE TARGET PORT IDENTIFER */
 839         u16             sep_rtpi;
 840         int             sep_tg_pt_secondary_stat;
 841         int             sep_tg_pt_secondary_write_md;
 842         u32             sep_index;
 843         struct scsi_port_stats sep_stats;
 844         /* Used for ALUA Target Port Groups membership */
 845         atomic_t        sep_tg_pt_secondary_offline;
 846         /* Used for PR ALL_TG_PT=1 */
 847         atomic_t        sep_tg_pt_ref_cnt;
 848         spinlock_t      sep_alua_lock;
 849         struct mutex    sep_tg_pt_md_mutex;
 850         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
 851         struct se_lun *sep_lun;
 852         struct se_portal_group *sep_tpg;
 853         struct list_head sep_alua_list;
 854         struct list_head sep_list;
 855 };
 856
 857 struct se_tpg_np {
 858         struct se_portal_group *tpg_np_parent;
 859         struct config_group     tpg_np_group;
 860 };
 861
 862 struct se_portal_group {
 863         /* Type of target portal group, see transport_tpg_type_table */
 864         enum transport_tpg_type_table se_tpg_type;
 865         /* Number of ACLed Initiator Nodes for this TPG */
 866         u32                     num_node_acls;
 867         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 868         atomic_t                tpg_pr_ref_count;
 869         /* Spinlock for adding/removing ACLed Nodes */
 870         spinlock_t              acl_node_lock;
 871         /* Spinlock for adding/removing sessions */
 872         spinlock_t              session_lock;
 873         spinlock_t              tpg_lun_lock;
 874         /* Pointer to $FABRIC_MOD portal group */
 875         void                    *se_tpg_fabric_ptr;
 876         struct list_head        se_tpg_node;
 877         /* linked list for initiator ACL list */
 878         struct list_head        acl_node_list;
 879         struct se_lun           **tpg_lun_list;
 880         struct se_lun           tpg_virt_lun0;
 881         /* List of TCM sessions associated wth this TPG */
 882         struct list_head        tpg_sess_list;
 883         /* Pointer to $FABRIC_MOD dependent code */
 884         const struct target_core_fabric_ops *se_tpg_tfo;
 885         struct se_wwn           *se_tpg_wwn;
 886         struct config_group     tpg_group;
 887         struct config_group     *tpg_default_groups[7];
 888         struct config_group     tpg_lun_group;
 889         struct config_group     tpg_np_group;
 890         struct config_group     tpg_acl_group;
 891         struct config_group     tpg_attrib_group;
 892         struct config_group     tpg_auth_group;
 893         struct config_group     tpg_param_group;
 894 };
 895
 896 struct se_wwn {
 897         struct target_fabric_configfs *wwn_tf;
 898         struct config_group     wwn_group;
 899         struct config_group     *wwn_default_groups[2];
 900         struct config_group     fabric_stat_group;
 901 };
 902
 903 static inline void atomic_inc_mb(atomic_t *v)
 904 {
 905         smp_mb__before_atomic();
 906         atomic_inc(v);
 907         smp_mb__after_atomic();
 908 }
 909
 910 static inline void atomic_dec_mb(atomic_t *v)
 911 {
 912         smp_mb__before_atomic();
 913         atomic_dec(v);
 914         smp_mb__after_atomic();
 915 }
 916
 917 #endif /* TARGET_CORE_BASE_H */