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 <linux/t10-pi.h>
  10 #include <net/sock.h>
  11 #include <net/tcp.h>
  12
  13 #define TARGET_CORE_VERSION             "v5.0"
  14
  15 /*
  16  * Maximum size of a CDB that can be stored in se_cmd without allocating
  17  * memory dynamically for the CDB.
  18  */
  19 #define TCM_MAX_COMMAND_SIZE                    32
  20 /*
  21  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  22  * defined 96, but the real limit is 252 (or 260 including the header)
  23  */
  24 #define TRANSPORT_SENSE_BUFFER                  96
  25 /* Used by transport_send_check_condition_and_sense() */
  26 #define SPC_SENSE_KEY_OFFSET                    2
  27 #define SPC_ADD_SENSE_LEN_OFFSET                7
  28 #define SPC_DESC_TYPE_OFFSET                    8
  29 #define SPC_ADDITIONAL_DESC_LEN_OFFSET          9
  30 #define SPC_VALIDITY_OFFSET                     10
  31 #define SPC_ASC_KEY_OFFSET                      12
  32 #define SPC_ASCQ_KEY_OFFSET                     13
  33 #define TRANSPORT_IQN_LEN                       224
  34 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  35 #define LU_GROUP_NAME_BUF                       256
  36 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  37 #define TG_PT_GROUP_NAME_BUF                    256
  38 /* Used to parse VPD into struct t10_vpd */
  39 #define VPD_TMP_BUF_SIZE                        254
  40 /* Used by transport_generic_cmd_sequencer() */
  41 #define READ_BLOCK_LEN                          6
  42 #define READ_CAP_LEN                            8
  43 #define READ_POSITION_LEN                       20
  44 #define INQUIRY_LEN                             36
  45 /* Used by transport_get_inquiry_vpd_serial() */
  46 #define INQUIRY_VPD_SERIAL_LEN                  254
  47 /* Used by transport_get_inquiry_vpd_device_ident() */
  48 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  49
  50 /* Attempts before moving from SHORT to LONG */
  51 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
  52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
  53 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
  54
  55 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
  56
  57 /* struct se_dev_attrib sanity values */
  58 /* Default max_unmap_lba_count */
  59 #define DA_MAX_UNMAP_LBA_COUNT                  0
  60 /* Default max_unmap_block_desc_count */
  61 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
  62 /* Default unmap_granularity */
  63 #define DA_UNMAP_GRANULARITY_DEFAULT            0
  64 /* Default unmap_granularity_alignment */
  65 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
  66 /* Default max_write_same_len, disabled by default */
  67 #define DA_MAX_WRITE_SAME_LEN                   0
  68 /* Use a model alias based on the configfs backend device name */
  69 #define DA_EMULATE_MODEL_ALIAS                  0
  70 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  71 #define DA_EMULATE_WRITE_CACHE                  0
  72 /* Emulation for UNIT ATTENTION Interlock Control */
  73 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  74 /* Emulation for TASK_ABORTED status (TAS) by default */
  75 #define DA_EMULATE_TAS                          1
  76 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  77 #define DA_EMULATE_TPU                          0
  78 /*
  79  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  80  * block/blk-lib.c:blkdev_issue_discard()
  81  */
  82 #define DA_EMULATE_TPWS                         0
  83 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
  84 #define DA_EMULATE_CAW                          1
  85 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
  86 #define DA_EMULATE_3PC                          1
  87 /* No Emulation for PSCSI by default */
  88 #define DA_EMULATE_ALUA                         0
  89 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
  90 #define DA_ENFORCE_PR_ISIDS                     1
  91 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
  92 #define DA_FORCE_PR_APTPL                       0
  93 #define DA_STATUS_MAX_SECTORS_MIN               16
  94 #define DA_STATUS_MAX_SECTORS_MAX               8192
  95 /* By default don't report non-rotating (solid state) medium */
  96 #define DA_IS_NONROT                            0
  97 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
  98 #define DA_EMULATE_REST_REORD                   0
  99
 100 #define SE_INQUIRY_BUF                          1024
 101 #define SE_MODE_PAGE_BUF                        512
 102 #define SE_SENSE_BUF                            96
 103
 104 /* struct se_hba->hba_flags */
 105 enum hba_flags_table {
 106         HBA_FLAGS_INTERNAL_USE  = 0x01,
 107         HBA_FLAGS_PSCSI_MODE    = 0x02,
 108 };
 109
 110 /* Special transport agnostic struct se_cmd->t_states */
 111 enum transport_state_table {
 112         TRANSPORT_NO_STATE      = 0,
 113         TRANSPORT_NEW_CMD       = 1,
 114         TRANSPORT_WRITE_PENDING = 3,
 115         TRANSPORT_PROCESSING    = 5,
 116         TRANSPORT_COMPLETE      = 6,
 117         TRANSPORT_ISTATE_PROCESSING = 11,
 118         TRANSPORT_COMPLETE_QF_WP = 18,
 119         TRANSPORT_COMPLETE_QF_OK = 19,
 120 };
 121
 122 /* Used for struct se_cmd->se_cmd_flags */
 123 enum se_cmd_flags_table {
 124         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 125         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 126         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 127         SCF_SCSI_DATA_CDB               = 0x00000008,
 128         SCF_SCSI_TMR_CDB                = 0x00000010,
 129         SCF_FUA                         = 0x00000080,
 130         SCF_SE_LUN_CMD                  = 0x00000100,
 131         SCF_BIDI                        = 0x00000400,
 132         SCF_SENT_CHECK_CONDITION        = 0x00000800,
 133         SCF_OVERFLOW_BIT                = 0x00001000,
 134         SCF_UNDERFLOW_BIT               = 0x00002000,
 135         SCF_SEND_DELAYED_TAS            = 0x00004000,
 136         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 137         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 138         SCF_COMPARE_AND_WRITE           = 0x00080000,
 139         SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
 140         SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
 141 };
 142
 143 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 144 enum transport_lunflags_table {
 145         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x01,
 146         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x02,
 147 };
 148
 149 /*
 150  * Used by transport_send_check_condition_and_sense()
 151  * to signal which ASC/ASCQ sense payload should be built.
 152  */
 153 typedef unsigned __bitwise__ sense_reason_t;
 154
 155 enum tcm_sense_reason_table {
 156 #define R(x)    (__force sense_reason_t )(x)
 157         TCM_NO_SENSE                            = R(0x00),
 158         TCM_NON_EXISTENT_LUN                    = R(0x01),
 159         TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
 160         TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
 161         TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
 162         TCM_SERVICE_CRC_ERROR                   = R(0x05),
 163         TCM_SNACK_REJECTED                      = R(0x06),
 164         TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
 165         TCM_INVALID_CDB_FIELD                   = R(0x08),
 166         TCM_INVALID_PARAMETER_LIST              = R(0x09),
 167         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
 168         TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
 169         TCM_WRITE_PROTECTED                     = R(0x0c),
 170         TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
 171         TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
 172         TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
 173         TCM_RESERVATION_CONFLICT                = R(0x10),
 174         TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
 175         TCM_OUT_OF_RESOURCES                    = R(0x12),
 176         TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
 177         TCM_MISCOMPARE_VERIFY                   = R(0x14),
 178         TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
 179         TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
 180         TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
 181 #undef R
 182 };
 183
 184 enum target_sc_flags_table {
 185         TARGET_SCF_BIDI_OP              = 0x01,
 186         TARGET_SCF_ACK_KREF             = 0x02,
 187         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 188 };
 189
 190 /* fabric independent task management function values */
 191 enum tcm_tmreq_table {
 192         TMR_ABORT_TASK          = 1,
 193         TMR_ABORT_TASK_SET      = 2,
 194         TMR_CLEAR_ACA           = 3,
 195         TMR_CLEAR_TASK_SET      = 4,
 196         TMR_LUN_RESET           = 5,
 197         TMR_TARGET_WARM_RESET   = 6,
 198         TMR_TARGET_COLD_RESET   = 7,
 199 };
 200
 201 /* fabric independent task management response values */
 202 enum tcm_tmrsp_table {
 203         TMR_FUNCTION_FAILED             = 0,
 204         TMR_FUNCTION_COMPLETE           = 1,
 205         TMR_TASK_DOES_NOT_EXIST         = 2,
 206         TMR_LUN_DOES_NOT_EXIST          = 3,
 207         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
 208         TMR_FUNCTION_REJECTED           = 5,
 209 };
 210
 211 /*
 212  * Used for target SCSI statistics
 213  */
 214 typedef enum {
 215         SCSI_INST_INDEX,
 216         SCSI_DEVICE_INDEX,
 217         SCSI_AUTH_INTR_INDEX,
 218         SCSI_INDEX_TYPE_MAX
 219 } scsi_index_t;
 220
 221 struct se_cmd;
 222
 223 struct t10_alua_lba_map_member {
 224         struct list_head lba_map_mem_list;
 225         int lba_map_mem_alua_state;
 226         int lba_map_mem_alua_pg_id;
 227 };
 228
 229 struct t10_alua_lba_map {
 230         u64 lba_map_first_lba;
 231         u64 lba_map_last_lba;
 232         struct list_head lba_map_list;
 233         struct list_head lba_map_mem_list;
 234 };
 235
 236 struct t10_alua {
 237         /* ALUA Target Port Group ID */
 238         u16     alua_tg_pt_gps_counter;
 239         u32     alua_tg_pt_gps_count;
 240         /* Referrals support */
 241         spinlock_t lba_map_lock;
 242         u32     lba_map_segment_size;
 243         u32     lba_map_segment_multiplier;
 244         struct list_head lba_map_list;
 245         spinlock_t tg_pt_gps_lock;
 246         struct se_device *t10_dev;
 247         /* Used for default ALUA Target Port Group */
 248         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 249         /* Used for default ALUA Target Port Group ConfigFS group */
 250         struct config_group alua_tg_pt_gps_group;
 251         struct list_head tg_pt_gps_list;
 252 };
 253
 254 struct t10_alua_lu_gp {
 255         u16     lu_gp_id;
 256         int     lu_gp_valid_id;
 257         u32     lu_gp_members;
 258         atomic_t lu_gp_ref_cnt;
 259         spinlock_t lu_gp_lock;
 260         struct config_group lu_gp_group;
 261         struct list_head lu_gp_node;
 262         struct list_head lu_gp_mem_list;
 263 };
 264
 265 struct t10_alua_lu_gp_member {
 266         bool lu_gp_assoc;
 267         atomic_t lu_gp_mem_ref_cnt;
 268         spinlock_t lu_gp_mem_lock;
 269         struct t10_alua_lu_gp *lu_gp;
 270         struct se_device *lu_gp_mem_dev;
 271         struct list_head lu_gp_mem_list;
 272 };
 273
 274 struct t10_alua_tg_pt_gp {
 275         u16     tg_pt_gp_id;
 276         int     tg_pt_gp_valid_id;
 277         int     tg_pt_gp_alua_supported_states;
 278         int     tg_pt_gp_alua_pending_state;
 279         int     tg_pt_gp_alua_previous_state;
 280         int     tg_pt_gp_alua_access_status;
 281         int     tg_pt_gp_alua_access_type;
 282         int     tg_pt_gp_nonop_delay_msecs;
 283         int     tg_pt_gp_trans_delay_msecs;
 284         int     tg_pt_gp_implicit_trans_secs;
 285         int     tg_pt_gp_pref;
 286         int     tg_pt_gp_write_metadata;
 287         u32     tg_pt_gp_members;
 288         atomic_t tg_pt_gp_alua_access_state;
 289         atomic_t tg_pt_gp_ref_cnt;
 290         spinlock_t tg_pt_gp_lock;
 291         struct mutex tg_pt_gp_md_mutex;
 292         struct se_device *tg_pt_gp_dev;
 293         struct config_group tg_pt_gp_group;
 294         struct list_head tg_pt_gp_list;
 295         struct list_head tg_pt_gp_lun_list;
 296         struct se_lun *tg_pt_gp_alua_lun;
 297         struct se_node_acl *tg_pt_gp_alua_nacl;
 298         struct delayed_work tg_pt_gp_transition_work;
 299         struct completion *tg_pt_gp_transition_complete;
 300 };
 301
 302 struct t10_vpd {
 303         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 304         int protocol_identifier_set;
 305         u32 protocol_identifier;
 306         u32 device_identifier_code_set;
 307         u32 association;
 308         u32 device_identifier_type;
 309         struct list_head vpd_list;
 310 };
 311
 312 struct t10_wwn {
 313         char vendor[8];
 314         char model[16];
 315         char revision[4];
 316         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 317         spinlock_t t10_vpd_lock;
 318         struct se_device *t10_dev;
 319         struct config_group t10_wwn_group;
 320         struct list_head t10_vpd_list;
 321 };
 322
 323 struct t10_pr_registration {
 324         /* Used for fabrics that contain WWN+ISID */
 325 #define PR_REG_ISID_LEN                         16
 326         /* PR_REG_ISID_LEN + ',i,0x' */
 327 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 328         char pr_reg_isid[PR_REG_ISID_LEN];
 329         /* Used during APTPL metadata reading */
 330 #define PR_APTPL_MAX_IPORT_LEN                  256
 331         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 332         /* Used during APTPL metadata reading */
 333 #define PR_APTPL_MAX_TPORT_LEN                  256
 334         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 335         u16 pr_aptpl_rpti;
 336         u16 pr_reg_tpgt;
 337         /* Reservation effects all target ports */
 338         int pr_reg_all_tg_pt;
 339         /* Activate Persistence across Target Power Loss */
 340         int pr_reg_aptpl;
 341         int pr_res_holder;
 342         int pr_res_type;
 343         int pr_res_scope;
 344         /* Used for fabric initiator WWPNs using a ISID */
 345         bool isid_present_at_reg;
 346         u64 pr_res_mapped_lun;
 347         u64 pr_aptpl_target_lun;
 348         u16 tg_pt_sep_rtpi;
 349         u32 pr_res_generation;
 350         u64 pr_reg_bin_isid;
 351         u64 pr_res_key;
 352         atomic_t pr_res_holders;
 353         struct se_node_acl *pr_reg_nacl;
 354         /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
 355         struct se_dev_entry *pr_reg_deve;
 356         struct list_head pr_reg_list;
 357         struct list_head pr_reg_abort_list;
 358         struct list_head pr_reg_aptpl_list;
 359         struct list_head pr_reg_atp_list;
 360         struct list_head pr_reg_atp_mem_list;
 361 };
 362
 363 struct t10_reservation {
 364         /* Reservation effects all target ports */
 365         int pr_all_tg_pt;
 366         /* Activate Persistence across Target Power Loss enabled
 367          * for SCSI device */
 368         int pr_aptpl_active;
 369 #define PR_APTPL_BUF_LEN                        262144
 370         u32 pr_generation;
 371         spinlock_t registration_lock;
 372         spinlock_t aptpl_reg_lock;
 373         /*
 374          * This will always be set by one individual I_T Nexus.
 375          * However with all_tg_pt=1, other I_T Nexus from the
 376          * same initiator can access PR reg/res info on a different
 377          * target port.
 378          *
 379          * There is also the 'All Registrants' case, where there is
 380          * a single *pr_res_holder of the reservation, but all
 381          * registrations are considered reservation holders.
 382          */
 383         struct se_node_acl *pr_res_holder;
 384         struct list_head registration_list;
 385         struct list_head aptpl_reg_list;
 386 };
 387
 388 struct se_tmr_req {
 389         /* Task Management function to be performed */
 390         u8                      function;
 391         /* Task Management response to send */
 392         u8                      response;
 393         int                     call_transport;
 394         /* Reference to ITT that Task Mgmt should be performed */
 395         u64                     ref_task_tag;
 396         void                    *fabric_tmr_ptr;
 397         struct se_cmd           *task_cmd;
 398         struct se_device        *tmr_dev;
 399         struct se_lun           *tmr_lun;
 400         struct list_head        tmr_list;
 401 };
 402
 403 enum target_prot_op {
 404         TARGET_PROT_NORMAL      = 0,
 405         TARGET_PROT_DIN_INSERT  = (1 << 0),
 406         TARGET_PROT_DOUT_INSERT = (1 << 1),
 407         TARGET_PROT_DIN_STRIP   = (1 << 2),
 408         TARGET_PROT_DOUT_STRIP  = (1 << 3),
 409         TARGET_PROT_DIN_PASS    = (1 << 4),
 410         TARGET_PROT_DOUT_PASS   = (1 << 5),
 411 };
 412
 413 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
 414                         TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
 415                         TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
 416
 417 enum target_prot_type {
 418         TARGET_DIF_TYPE0_PROT,
 419         TARGET_DIF_TYPE1_PROT,
 420         TARGET_DIF_TYPE2_PROT,
 421         TARGET_DIF_TYPE3_PROT,
 422 };
 423
 424 enum target_core_dif_check {
 425         TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
 426         TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
 427         TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
 428 };
 429
 430 /* for sam_task_attr */
 431 #define TCM_SIMPLE_TAG  0x20
 432 #define TCM_HEAD_TAG    0x21
 433 #define TCM_ORDERED_TAG 0x22
 434 #define TCM_ACA_TAG     0x24
 435
 436 struct se_cmd {
 437         /* SAM response code being sent to initiator */
 438         u8                      scsi_status;
 439         u8                      scsi_asc;
 440         u8                      scsi_ascq;
 441         u16                     scsi_sense_length;
 442         unsigned                cmd_wait_set:1;
 443         unsigned                unknown_data_length:1;
 444         bool                    state_active:1;
 445         u64                     tag; /* SAM command identifier aka task tag */
 446         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 447         int                     alua_nonop_delay;
 448         /* See include/linux/dma-mapping.h */
 449         enum dma_data_direction data_direction;
 450         /* For SAM Task Attribute */
 451         int                     sam_task_attr;
 452         /* Used for se_sess->sess_tag_pool */
 453         unsigned int            map_tag;
 454         /* Transport protocol dependent state, see transport_state_table */
 455         enum transport_state_table t_state;
 456         /* See se_cmd_flags_table */
 457         u32                     se_cmd_flags;
 458         /* Total size in bytes associated with command */
 459         u32                     data_length;
 460         u32                     residual_count;
 461         u64                     orig_fe_lun;
 462         /* Persistent Reservation key */
 463         u64                     pr_res_key;
 464         /* Used for sense data */
 465         void                    *sense_buffer;
 466         struct list_head        se_delayed_node;
 467         struct list_head        se_qf_node;
 468         struct se_device      *se_dev;
 469         struct se_lun           *se_lun;
 470         /* Only used for internal passthrough and legacy TCM fabric modules */
 471         struct se_session       *se_sess;
 472         struct se_tmr_req       *se_tmr_req;
 473         struct list_head        se_cmd_list;
 474         struct completion       cmd_wait_comp;
 475         const struct target_core_fabric_ops *se_tfo;
 476         sense_reason_t          (*execute_cmd)(struct se_cmd *);
 477         sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
 478         void                    *protocol_data;
 479
 480         unsigned char           *t_task_cdb;
 481         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 482         unsigned long long      t_task_lba;
 483         unsigned int            t_task_nolb;
 484         unsigned int            transport_state;
 485 #define CMD_T_ABORTED           (1 << 0)
 486 #define CMD_T_ACTIVE            (1 << 1)
 487 #define CMD_T_COMPLETE          (1 << 2)
 488 #define CMD_T_SENT              (1 << 4)
 489 #define CMD_T_STOP              (1 << 5)
 490 #define CMD_T_DEV_ACTIVE        (1 << 7)
 491 #define CMD_T_REQUEST_STOP      (1 << 8)
 492 #define CMD_T_BUSY              (1 << 9)
 493         spinlock_t              t_state_lock;
 494         struct kref             cmd_kref;
 495         struct completion       t_transport_stop_comp;
 496
 497         struct work_struct      work;
 498
 499         struct scatterlist      *t_data_sg;
 500         struct scatterlist      *t_data_sg_orig;
 501         unsigned int            t_data_nents;
 502         unsigned int            t_data_nents_orig;
 503         void                    *t_data_vmap;
 504         struct scatterlist      *t_bidi_data_sg;
 505         unsigned int            t_bidi_data_nents;
 506
 507         /* Used for lun->lun_ref counting */
 508         int                     lun_ref_active;
 509
 510         struct list_head        state_list;
 511
 512         /* old task stop completion, consider merging with some of the above */
 513         struct completion       task_stop_comp;
 514
 515         /* backend private data */
 516         void                    *priv;
 517
 518         /* DIF related members */
 519         enum target_prot_op     prot_op;
 520         enum target_prot_type   prot_type;
 521         u8                      prot_checks;
 522         bool                    prot_pto;
 523         u32                     prot_length;
 524         u32                     reftag_seed;
 525         struct scatterlist      *t_prot_sg;
 526         unsigned int            t_prot_nents;
 527         sense_reason_t          pi_err;
 528         sector_t                bad_sector;
 529 };
 530
 531 struct se_ua {
 532         u8                      ua_asc;
 533         u8                      ua_ascq;
 534         struct list_head        ua_nacl_list;
 535 };
 536
 537 struct se_node_acl {
 538         char                    initiatorname[TRANSPORT_IQN_LEN];
 539         /* Used to signal demo mode created ACL, disabled by default */
 540         bool                    dynamic_node_acl;
 541         bool                    acl_stop:1;
 542         u32                     queue_depth;
 543         u32                     acl_index;
 544         enum target_prot_type   saved_prot_type;
 545 #define MAX_ACL_TAG_SIZE 64
 546         char                    acl_tag[MAX_ACL_TAG_SIZE];
 547         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 548         atomic_t                acl_pr_ref_count;
 549         struct hlist_head       lun_entry_hlist;
 550         struct se_session       *nacl_sess;
 551         struct se_portal_group *se_tpg;
 552         struct mutex            lun_entry_mutex;
 553         spinlock_t              nacl_sess_lock;
 554         struct config_group     acl_group;
 555         struct config_group     acl_attrib_group;
 556         struct config_group     acl_auth_group;
 557         struct config_group     acl_param_group;
 558         struct config_group     acl_fabric_stat_group;
 559         struct config_group     *acl_default_groups[5];
 560         struct list_head        acl_list;
 561         struct list_head        acl_sess_list;
 562         struct completion       acl_free_comp;
 563         struct kref             acl_kref;
 564 };
 565
 566 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
 567 {
 568         return container_of(to_config_group(item), struct se_node_acl,
 569                         acl_group);
 570 }
 571
 572 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
 573 {
 574         return container_of(to_config_group(item), struct se_node_acl,
 575                         acl_attrib_group);
 576 }
 577
 578 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
 579 {
 580         return container_of(to_config_group(item), struct se_node_acl,
 581                         acl_auth_group);
 582 }
 583
 584 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
 585 {
 586         return container_of(to_config_group(item), struct se_node_acl,
 587                         acl_param_group);
 588 }
 589
 590 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
 591 {
 592         return container_of(to_config_group(item), struct se_node_acl,
 593                         acl_fabric_stat_group);
 594 }
 595
 596 struct se_session {
 597         unsigned                sess_tearing_down:1;
 598         u64                     sess_bin_isid;
 599         enum target_prot_op     sup_prot_ops;
 600         enum target_prot_type   sess_prot_type;
 601         struct se_node_acl      *se_node_acl;
 602         struct se_portal_group *se_tpg;
 603         void                    *fabric_sess_ptr;
 604         struct list_head        sess_list;
 605         struct list_head        sess_acl_list;
 606         struct list_head        sess_cmd_list;
 607         struct list_head        sess_wait_list;
 608         spinlock_t              sess_cmd_lock;
 609         struct kref             sess_kref;
 610         void                    *sess_cmd_map;
 611         struct percpu_ida       sess_tag_pool;
 612 };
 613
 614 struct se_device;
 615 struct se_transform_info;
 616 struct scatterlist;
 617
 618 struct se_ml_stat_grps {
 619         struct config_group     stat_group;
 620         struct config_group     scsi_auth_intr_group;
 621         struct config_group     scsi_att_intr_port_group;
 622 };
 623
 624 struct se_lun_acl {
 625         u64                     mapped_lun;
 626         struct se_node_acl      *se_lun_nacl;
 627         struct se_lun           *se_lun;
 628         struct config_group     se_lun_group;
 629         struct se_ml_stat_grps  ml_stat_grps;
 630 };
 631
 632 struct se_dev_entry {
 633         /* See transport_lunflags_table */
 634         u64                     mapped_lun;
 635         u64                     pr_res_key;
 636         u64                     creation_time;
 637         u32                     lun_flags;
 638         u32                     attach_count;
 639         atomic_long_t           total_cmds;
 640         atomic_long_t           read_bytes;
 641         atomic_long_t           write_bytes;
 642         atomic_t                ua_count;
 643         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 644         struct kref             pr_kref;
 645         struct completion       pr_comp;
 646         struct se_lun_acl __rcu *se_lun_acl;
 647         spinlock_t              ua_lock;
 648         struct se_lun __rcu     *se_lun;
 649 #define DEF_PR_REG_ACTIVE               1
 650         unsigned long           deve_flags;
 651         struct list_head        alua_port_list;
 652         struct list_head        lun_link;
 653         struct list_head        ua_list;
 654         struct hlist_node       link;
 655         struct rcu_head         rcu_head;
 656 };
 657
 658 struct se_dev_attrib {
 659         int             emulate_model_alias;
 660         int             emulate_dpo;
 661         int             emulate_fua_write;
 662         int             emulate_fua_read;
 663         int             emulate_write_cache;
 664         int             emulate_ua_intlck_ctrl;
 665         int             emulate_tas;
 666         int             emulate_tpu;
 667         int             emulate_tpws;
 668         int             emulate_caw;
 669         int             emulate_3pc;
 670         int             pi_prot_format;
 671         enum target_prot_type pi_prot_type;
 672         enum target_prot_type hw_pi_prot_type;
 673         int             enforce_pr_isids;
 674         int             force_pr_aptpl;
 675         int             is_nonrot;
 676         int             emulate_rest_reord;
 677         u32             hw_block_size;
 678         u32             block_size;
 679         u32             hw_max_sectors;
 680         u32             optimal_sectors;
 681         u32             hw_queue_depth;
 682         u32             queue_depth;
 683         u32             max_unmap_lba_count;
 684         u32             max_unmap_block_desc_count;
 685         u32             unmap_granularity;
 686         u32             unmap_granularity_alignment;
 687         u32             max_write_same_len;
 688         u32             max_bytes_per_io;
 689         struct se_device *da_dev;
 690         struct config_group da_group;
 691 };
 692
 693 struct se_port_stat_grps {
 694         struct config_group stat_group;
 695         struct config_group scsi_port_group;
 696         struct config_group scsi_tgt_port_group;
 697         struct config_group scsi_transport_group;
 698 };
 699
 700 struct scsi_port_stats {
 701         atomic_long_t   cmd_pdus;
 702         atomic_long_t   tx_data_octets;
 703         atomic_long_t   rx_data_octets;
 704 };
 705
 706 struct se_lun {
 707         u64                     unpacked_lun;
 708 #define SE_LUN_LINK_MAGIC                       0xffff7771
 709         u32                     lun_link_magic;
 710         u32                     lun_access;
 711         u32                     lun_index;
 712
 713         /* RELATIVE TARGET PORT IDENTIFER */
 714         u16                     lun_rtpi;
 715         atomic_t                lun_acl_count;
 716         struct se_device __rcu  *lun_se_dev;
 717
 718         struct list_head        lun_deve_list;
 719         spinlock_t              lun_deve_lock;
 720
 721         /* ALUA state */
 722         int                     lun_tg_pt_secondary_stat;
 723         int                     lun_tg_pt_secondary_write_md;
 724         atomic_t                lun_tg_pt_secondary_offline;
 725         struct mutex            lun_tg_pt_md_mutex;
 726
 727         /* ALUA target port group linkage */
 728         struct list_head        lun_tg_pt_gp_link;
 729         struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
 730         spinlock_t              lun_tg_pt_gp_lock;
 731
 732         struct se_portal_group  *lun_tpg;
 733         struct scsi_port_stats  lun_stats;
 734         struct config_group     lun_group;
 735         struct se_port_stat_grps port_stat_grps;
 736         struct completion       lun_ref_comp;
 737         struct percpu_ref       lun_ref;
 738         struct list_head        lun_dev_link;
 739         struct hlist_node       link;
 740         struct rcu_head         rcu_head;
 741 };
 742
 743 struct se_dev_stat_grps {
 744         struct config_group stat_group;
 745         struct config_group scsi_dev_group;
 746         struct config_group scsi_tgt_dev_group;
 747         struct config_group scsi_lu_group;
 748 };
 749
 750 struct se_device {
 751 #define SE_DEV_LINK_MAGIC                       0xfeeddeef
 752         u32                     dev_link_magic;
 753         /* RELATIVE TARGET PORT IDENTIFER Counter */
 754         u16                     dev_rpti_counter;
 755         /* Used for SAM Task Attribute ordering */
 756         u32                     dev_cur_ordered_id;
 757         u32                     dev_flags;
 758 #define DF_CONFIGURED                           0x00000001
 759 #define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
 760 #define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
 761 #define DF_USING_UDEV_PATH                      0x00000008
 762 #define DF_USING_ALIAS                          0x00000010
 763 #define DF_READ_ONLY                            0x00000020
 764         /* Physical device queue depth */
 765         u32                     queue_depth;
 766         /* Used for SPC-2 reservations enforce of ISIDs */
 767         u64                     dev_res_bin_isid;
 768         /* Pointer to transport specific device structure */
 769         u32                     dev_index;
 770         u64                     creation_time;
 771         atomic_long_t           num_resets;
 772         atomic_long_t           num_cmds;
 773         atomic_long_t           read_bytes;
 774         atomic_long_t           write_bytes;
 775         /* Active commands on this virtual SE device */
 776         atomic_t                simple_cmds;
 777         atomic_t                dev_ordered_sync;
 778         atomic_t                dev_qf_count;
 779         u32                     export_count;
 780         spinlock_t              delayed_cmd_lock;
 781         spinlock_t              execute_task_lock;
 782         spinlock_t              dev_reservation_lock;
 783         unsigned int            dev_reservation_flags;
 784 #define DRF_SPC2_RESERVATIONS                   0x00000001
 785 #define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
 786         spinlock_t              se_port_lock;
 787         spinlock_t              se_tmr_lock;
 788         spinlock_t              qf_cmd_lock;
 789         struct semaphore        caw_sem;
 790         /* Used for legacy SPC-2 reservationsa */
 791         struct se_node_acl      *dev_reserved_node_acl;
 792         /* Used for ALUA Logical Unit Group membership */
 793         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 794         /* Used for SPC-3 Persistent Reservations */
 795         struct t10_pr_registration *dev_pr_res_holder;
 796         struct list_head        dev_sep_list;
 797         struct list_head        dev_tmr_list;
 798         struct workqueue_struct *tmr_wq;
 799         struct work_struct      qf_work_queue;
 800         struct list_head        delayed_cmd_list;
 801         struct list_head        state_list;
 802         struct list_head        qf_cmd_list;
 803         struct list_head        g_dev_node;
 804         /* Pointer to associated SE HBA */
 805         struct se_hba           *se_hba;
 806         /* T10 Inquiry and VPD WWN Information */
 807         struct t10_wwn          t10_wwn;
 808         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 809         struct t10_alua         t10_alua;
 810         /* T10 SPC-2 + SPC-3 Reservations */
 811         struct t10_reservation  t10_pr;
 812         struct se_dev_attrib    dev_attrib;
 813         struct config_group     dev_group;
 814         struct config_group     dev_pr_group;
 815         struct se_dev_stat_grps dev_stat_grps;
 816 #define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
 817         unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
 818 #define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
 819         unsigned char           udev_path[SE_UDEV_PATH_LEN];
 820         /* Pointer to template of function pointers for transport */
 821         const struct target_backend_ops *transport;
 822         /* Linked list for struct se_hba struct se_device list */
 823         struct list_head        dev_list;
 824         struct se_lun           xcopy_lun;
 825         /* Protection Information */
 826         int                     prot_length;
 827         /* For se_lun->lun_se_dev RCU read-side critical access */
 828         u32                     hba_index;
 829         struct rcu_head         rcu_head;
 830 };
 831
 832 struct se_hba {
 833         u16                     hba_tpgt;
 834         u32                     hba_id;
 835         /* See hba_flags_table */
 836         u32                     hba_flags;
 837         /* Virtual iSCSI devices attached. */
 838         u32                     dev_count;
 839         u32                     hba_index;
 840         /* Pointer to transport specific host structure. */
 841         void                    *hba_ptr;
 842         struct list_head        hba_node;
 843         spinlock_t              device_lock;
 844         struct config_group     hba_group;
 845         struct mutex            hba_access_mutex;
 846         struct target_backend   *backend;
 847 };
 848
 849 struct se_tpg_np {
 850         struct se_portal_group *tpg_np_parent;
 851         struct config_group     tpg_np_group;
 852 };
 853
 854 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
 855 {
 856         return container_of(to_config_group(item), struct se_tpg_np,
 857                         tpg_np_group);
 858 }
 859
 860 struct se_portal_group {
 861         /*
 862          * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
 863          *
 864          * Negative values can be used by fabric drivers for internal use TPGs.
 865          */
 866         int                     proto_id;
 867         /* Number of ACLed Initiator Nodes for this TPG */
 868         u32                     num_node_acls;
 869         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 870         atomic_t                tpg_pr_ref_count;
 871         /* Spinlock for adding/removing ACLed Nodes */
 872         struct mutex            acl_node_mutex;
 873         /* Spinlock for adding/removing sessions */
 874         spinlock_t              session_lock;
 875         struct mutex            tpg_lun_mutex;
 876         struct list_head        se_tpg_node;
 877         /* linked list for initiator ACL list */
 878         struct list_head        acl_node_list;
 879         struct hlist_head       tpg_lun_hlist;
 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 static inline struct se_portal_group *to_tpg(struct config_item *item)
 897 {
 898         return container_of(to_config_group(item), struct se_portal_group,
 899                         tpg_group);
 900 }
 901
 902 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
 903 {
 904         return container_of(to_config_group(item), struct se_portal_group,
 905                         tpg_attrib_group);
 906 }
 907
 908 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
 909 {
 910         return container_of(to_config_group(item), struct se_portal_group,
 911                         tpg_auth_group);
 912 }
 913
 914 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
 915 {
 916         return container_of(to_config_group(item), struct se_portal_group,
 917                         tpg_param_group);
 918 }
 919
 920 struct se_wwn {
 921         struct target_fabric_configfs *wwn_tf;
 922         struct config_group     wwn_group;
 923         struct config_group     *wwn_default_groups[2];
 924         struct config_group     fabric_stat_group;
 925 };
 926
 927 static inline void atomic_inc_mb(atomic_t *v)
 928 {
 929         smp_mb__before_atomic();
 930         atomic_inc(v);
 931         smp_mb__after_atomic();
 932 }
 933
 934 static inline void atomic_dec_mb(atomic_t *v)
 935 {
 936         smp_mb__before_atomic();
 937         atomic_dec(v);
 938         smp_mb__after_atomic();
 939 }
 940
 941 #endif /* TARGET_CORE_BASE_H */