include/target/target_core_base.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef TARGET_CORE_BASE_H
   3 #define TARGET_CORE_BASE_H
   4
   5 #include <linux/configfs.h>      /* struct config_group */
   6 #include <linux/dma-direction.h> /* enum dma_data_direction */
   7 #include <linux/sbitmap.h>
   8 #include <linux/percpu-refcount.h>
   9 #include <linux/semaphore.h>     /* struct semaphore */
  10 #include <linux/completion.h>
  11
  12 #define TARGET_CORE_VERSION             "v5.0"
  13
  14 /*
  15  * Maximum size of a CDB that can be stored in se_cmd without allocating
  16  * memory dynamically for the CDB.
  17  */
  18 #define TCM_MAX_COMMAND_SIZE                    32
  19 /*
  20  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
  21  * defined 96, but the real limit is 252 (or 260 including the header)
  22  */
  23 #define TRANSPORT_SENSE_BUFFER                  96
  24 /* Used by transport_send_check_condition_and_sense() */
  25 #define SPC_SENSE_KEY_OFFSET                    2
  26 #define SPC_ADD_SENSE_LEN_OFFSET                7
  27 #define SPC_DESC_TYPE_OFFSET                    8
  28 #define SPC_ADDITIONAL_DESC_LEN_OFFSET          9
  29 #define SPC_VALIDITY_OFFSET                     10
  30 #define SPC_ASC_KEY_OFFSET                      12
  31 #define SPC_ASCQ_KEY_OFFSET                     13
  32 #define TRANSPORT_IQN_LEN                       224
  33 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
  34 #define LU_GROUP_NAME_BUF                       256
  35 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
  36 #define TG_PT_GROUP_NAME_BUF                    256
  37 /* Used to parse VPD into struct t10_vpd */
  38 #define VPD_TMP_BUF_SIZE                        254
  39 /* Used by transport_generic_cmd_sequencer() */
  40 #define READ_BLOCK_LEN                          6
  41 #define READ_CAP_LEN                            8
  42 #define READ_POSITION_LEN                       20
  43 #define INQUIRY_LEN                             36
  44 /* Used by transport_get_inquiry_vpd_serial() */
  45 #define INQUIRY_VPD_SERIAL_LEN                  254
  46 /* Used by transport_get_inquiry_vpd_device_ident() */
  47 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
  48
  49 #define INQUIRY_VENDOR_LEN                      8
  50 #define INQUIRY_MODEL_LEN                       16
  51 #define INQUIRY_REVISION_LEN                    4
  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 unmap_zeroes_data */
  70 #define DA_UNMAP_ZEROES_DATA_DEFAULT            0
  71 /* Default max_write_same_len, disabled by default */
  72 #define DA_MAX_WRITE_SAME_LEN                   0
  73 /* Use a model alias based on the configfs backend device name */
  74 #define DA_EMULATE_MODEL_ALIAS                  0
  75 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  76 #define DA_EMULATE_WRITE_CACHE                  0
  77 /* Emulation for UNIT ATTENTION Interlock Control */
  78 #define DA_EMULATE_UA_INTLLCK_CTRL              0
  79 /* Emulation for TASK_ABORTED status (TAS) by default */
  80 #define DA_EMULATE_TAS                          1
  81 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  82 #define DA_EMULATE_TPU                          0
  83 /*
  84  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  85  * block/blk-lib.c:blkdev_issue_discard()
  86  */
  87 #define DA_EMULATE_TPWS                         0
  88 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
  89 #define DA_EMULATE_CAW                          1
  90 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
  91 #define DA_EMULATE_3PC                          1
  92 /* No Emulation for PSCSI by default */
  93 #define DA_EMULATE_ALUA                         0
  94 /* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
  95 #define DA_EMULATE_PR                           1
  96 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
  97 #define DA_ENFORCE_PR_ISIDS                     1
  98 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
  99 #define DA_FORCE_PR_APTPL                       0
 100 #define DA_STATUS_MAX_SECTORS_MIN               16
 101 #define DA_STATUS_MAX_SECTORS_MAX               8192
 102 /* By default don't report non-rotating (solid state) medium */
 103 #define DA_IS_NONROT                            0
 104 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
 105 #define DA_EMULATE_REST_REORD                   0
 106
 107 #define SE_INQUIRY_BUF                          1024
 108 #define SE_MODE_PAGE_BUF                        512
 109 #define SE_SENSE_BUF                            96
 110
 111 /* struct se_hba->hba_flags */
 112 enum hba_flags_table {
 113         HBA_FLAGS_INTERNAL_USE  = 0x01,
 114         HBA_FLAGS_PSCSI_MODE    = 0x02,
 115 };
 116
 117 /* Special transport agnostic struct se_cmd->t_states */
 118 enum transport_state_table {
 119         TRANSPORT_NO_STATE      = 0,
 120         TRANSPORT_NEW_CMD       = 1,
 121         TRANSPORT_WRITE_PENDING = 3,
 122         TRANSPORT_PROCESSING    = 5,
 123         TRANSPORT_COMPLETE      = 6,
 124         TRANSPORT_ISTATE_PROCESSING = 11,
 125         TRANSPORT_COMPLETE_QF_WP = 18,
 126         TRANSPORT_COMPLETE_QF_OK = 19,
 127         TRANSPORT_COMPLETE_QF_ERR = 20,
 128 };
 129
 130 /* Used for struct se_cmd->se_cmd_flags */
 131 enum se_cmd_flags_table {
 132         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 133         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 134         SCF_EMULATED_TASK_SENSE         = 0x00000004,
 135         SCF_SCSI_DATA_CDB               = 0x00000008,
 136         SCF_SCSI_TMR_CDB                = 0x00000010,
 137         SCF_FUA                         = 0x00000080,
 138         SCF_SE_LUN_CMD                  = 0x00000100,
 139         SCF_BIDI                        = 0x00000400,
 140         SCF_SENT_CHECK_CONDITION        = 0x00000800,
 141         SCF_OVERFLOW_BIT                = 0x00001000,
 142         SCF_UNDERFLOW_BIT               = 0x00002000,
 143         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 144         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 145         SCF_COMPARE_AND_WRITE           = 0x00080000,
 146         SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
 147         SCF_ACK_KREF                    = 0x00400000,
 148         SCF_USE_CPUID                   = 0x00800000,
 149         SCF_TASK_ATTR_SET               = 0x01000000,
 150         SCF_TREAT_READ_AS_NORMAL        = 0x02000000,
 151 };
 152
 153 /*
 154  * Used by transport_send_check_condition_and_sense()
 155  * to signal which ASC/ASCQ sense payload should be built.
 156  */
 157 typedef unsigned __bitwise sense_reason_t;
 158
 159 enum tcm_sense_reason_table {
 160 #define R(x)    (__force sense_reason_t )(x)
 161         TCM_NO_SENSE                            = R(0x00),
 162         TCM_NON_EXISTENT_LUN                    = R(0x01),
 163         TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
 164         TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
 165         TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
 166         TCM_SERVICE_CRC_ERROR                   = R(0x05),
 167         TCM_SNACK_REJECTED                      = R(0x06),
 168         TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
 169         TCM_INVALID_CDB_FIELD                   = R(0x08),
 170         TCM_INVALID_PARAMETER_LIST              = R(0x09),
 171         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
 172         TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
 173         TCM_WRITE_PROTECTED                     = R(0x0c),
 174         TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
 175         TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
 176         TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
 177         TCM_RESERVATION_CONFLICT                = R(0x10),
 178         TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
 179         TCM_OUT_OF_RESOURCES                    = R(0x12),
 180         TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
 181         TCM_MISCOMPARE_VERIFY                   = R(0x14),
 182         TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
 183         TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
 184         TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
 185         TCM_COPY_TARGET_DEVICE_NOT_REACHABLE    = R(0x18),
 186         TCM_TOO_MANY_TARGET_DESCS               = R(0x19),
 187         TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE   = R(0x1a),
 188         TCM_TOO_MANY_SEGMENT_DESCS              = R(0x1b),
 189         TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE  = R(0x1c),
 190         TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
 191         TCM_LUN_BUSY                            = R(0x1e),
 192 #undef R
 193 };
 194
 195 enum target_sc_flags_table {
 196         TARGET_SCF_BIDI_OP              = 0x01,
 197         TARGET_SCF_ACK_KREF             = 0x02,
 198         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 199         TARGET_SCF_USE_CPUID            = 0x08,
 200         TARGET_SCF_LOOKUP_LUN_FROM_TAG  = 0x10,
 201 };
 202
 203 /* fabric independent task management function values */
 204 enum tcm_tmreq_table {
 205         TMR_ABORT_TASK          = 1,
 206         TMR_ABORT_TASK_SET      = 2,
 207         TMR_CLEAR_ACA           = 3,
 208         TMR_CLEAR_TASK_SET      = 4,
 209         TMR_LUN_RESET           = 5,
 210         TMR_TARGET_WARM_RESET   = 6,
 211         TMR_TARGET_COLD_RESET   = 7,
 212         TMR_UNKNOWN             = 0xff,
 213 };
 214
 215 /* fabric independent task management response values */
 216 enum tcm_tmrsp_table {
 217         TMR_FUNCTION_FAILED             = 0,
 218         TMR_FUNCTION_COMPLETE           = 1,
 219         TMR_TASK_DOES_NOT_EXIST         = 2,
 220         TMR_LUN_DOES_NOT_EXIST          = 3,
 221         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
 222         TMR_FUNCTION_REJECTED           = 5,
 223 };
 224
 225 /*
 226  * Used for target SCSI statistics
 227  */
 228 typedef enum {
 229         SCSI_INST_INDEX,
 230         SCSI_AUTH_INTR_INDEX,
 231         SCSI_INDEX_TYPE_MAX
 232 } scsi_index_t;
 233
 234 struct se_cmd;
 235
 236 struct t10_alua_lba_map_member {
 237         struct list_head lba_map_mem_list;
 238         int lba_map_mem_alua_state;
 239         int lba_map_mem_alua_pg_id;
 240 };
 241
 242 struct t10_alua_lba_map {
 243         u64 lba_map_first_lba;
 244         u64 lba_map_last_lba;
 245         struct list_head lba_map_list;
 246         struct list_head lba_map_mem_list;
 247 };
 248
 249 struct t10_alua {
 250         /* ALUA Target Port Group ID */
 251         u16     alua_tg_pt_gps_counter;
 252         u32     alua_tg_pt_gps_count;
 253         /* Referrals support */
 254         spinlock_t lba_map_lock;
 255         u32     lba_map_segment_size;
 256         u32     lba_map_segment_multiplier;
 257         struct list_head lba_map_list;
 258         spinlock_t tg_pt_gps_lock;
 259         struct se_device *t10_dev;
 260         /* Used for default ALUA Target Port Group */
 261         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 262         /* Used for default ALUA Target Port Group ConfigFS group */
 263         struct config_group alua_tg_pt_gps_group;
 264         struct list_head tg_pt_gps_list;
 265 };
 266
 267 struct t10_alua_lu_gp {
 268         u16     lu_gp_id;
 269         int     lu_gp_valid_id;
 270         u32     lu_gp_members;
 271         atomic_t lu_gp_ref_cnt;
 272         spinlock_t lu_gp_lock;
 273         struct config_group lu_gp_group;
 274         struct list_head lu_gp_node;
 275         struct list_head lu_gp_mem_list;
 276 };
 277
 278 struct t10_alua_lu_gp_member {
 279         bool lu_gp_assoc;
 280         atomic_t lu_gp_mem_ref_cnt;
 281         spinlock_t lu_gp_mem_lock;
 282         struct t10_alua_lu_gp *lu_gp;
 283         struct se_device *lu_gp_mem_dev;
 284         struct list_head lu_gp_mem_list;
 285 };
 286
 287 struct t10_alua_tg_pt_gp {
 288         u16     tg_pt_gp_id;
 289         int     tg_pt_gp_valid_id;
 290         int     tg_pt_gp_alua_supported_states;
 291         int     tg_pt_gp_alua_access_status;
 292         int     tg_pt_gp_alua_access_type;
 293         int     tg_pt_gp_nonop_delay_msecs;
 294         int     tg_pt_gp_trans_delay_msecs;
 295         int     tg_pt_gp_implicit_trans_secs;
 296         int     tg_pt_gp_pref;
 297         int     tg_pt_gp_write_metadata;
 298         u32     tg_pt_gp_members;
 299         int     tg_pt_gp_alua_access_state;
 300         atomic_t tg_pt_gp_ref_cnt;
 301         spinlock_t tg_pt_gp_lock;
 302         struct mutex tg_pt_gp_transition_mutex;
 303         struct se_device *tg_pt_gp_dev;
 304         struct config_group tg_pt_gp_group;
 305         struct list_head tg_pt_gp_list;
 306         struct list_head tg_pt_gp_lun_list;
 307         struct se_lun *tg_pt_gp_alua_lun;
 308         struct se_node_acl *tg_pt_gp_alua_nacl;
 309 };
 310
 311 struct t10_vpd {
 312         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 313         int protocol_identifier_set;
 314         u32 protocol_identifier;
 315         u32 device_identifier_code_set;
 316         u32 association;
 317         u32 device_identifier_type;
 318         struct list_head vpd_list;
 319 };
 320
 321 struct t10_wwn {
 322         /*
 323          * SCSI left aligned strings may not be null terminated. +1 to ensure a
 324          * null terminator is always present.
 325          */
 326         char vendor[INQUIRY_VENDOR_LEN + 1];
 327         char model[INQUIRY_MODEL_LEN + 1];
 328         char revision[INQUIRY_REVISION_LEN + 1];
 329         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 330         spinlock_t t10_vpd_lock;
 331         struct se_device *t10_dev;
 332         struct config_group t10_wwn_group;
 333         struct list_head t10_vpd_list;
 334 };
 335
 336 struct t10_pr_registration {
 337         /* Used for fabrics that contain WWN+ISID */
 338 #define PR_REG_ISID_LEN                         16
 339         /* PR_REG_ISID_LEN + ',i,0x' */
 340 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 341         char pr_reg_isid[PR_REG_ISID_LEN];
 342         /* Used during APTPL metadata reading */
 343 #define PR_APTPL_MAX_IPORT_LEN                  256
 344         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 345         /* Used during APTPL metadata reading */
 346 #define PR_APTPL_MAX_TPORT_LEN                  256
 347         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 348         u16 pr_aptpl_rpti;
 349         u16 pr_reg_tpgt;
 350         /* Reservation effects all target ports */
 351         int pr_reg_all_tg_pt;
 352         /* Activate Persistence across Target Power Loss */
 353         int pr_reg_aptpl;
 354         int pr_res_holder;
 355         int pr_res_type;
 356         int pr_res_scope;
 357         /* Used for fabric initiator WWPNs using a ISID */
 358         bool isid_present_at_reg;
 359         u64 pr_res_mapped_lun;
 360         u64 pr_aptpl_target_lun;
 361         u16 tg_pt_sep_rtpi;
 362         u32 pr_res_generation;
 363         u64 pr_reg_bin_isid;
 364         u64 pr_res_key;
 365         atomic_t pr_res_holders;
 366         struct se_node_acl *pr_reg_nacl;
 367         /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
 368         struct se_dev_entry *pr_reg_deve;
 369         struct list_head pr_reg_list;
 370         struct list_head pr_reg_abort_list;
 371         struct list_head pr_reg_aptpl_list;
 372         struct list_head pr_reg_atp_list;
 373         struct list_head pr_reg_atp_mem_list;
 374 };
 375
 376 struct t10_reservation {
 377         /* Reservation effects all target ports */
 378         int pr_all_tg_pt;
 379         /* Activate Persistence across Target Power Loss enabled
 380          * for SCSI device */
 381         int pr_aptpl_active;
 382 #define PR_APTPL_BUF_LEN                        262144
 383         u32 pr_generation;
 384         spinlock_t registration_lock;
 385         spinlock_t aptpl_reg_lock;
 386         /*
 387          * This will always be set by one individual I_T Nexus.
 388          * However with all_tg_pt=1, other I_T Nexus from the
 389          * same initiator can access PR reg/res info on a different
 390          * target port.
 391          *
 392          * There is also the 'All Registrants' case, where there is
 393          * a single *pr_res_holder of the reservation, but all
 394          * registrations are considered reservation holders.
 395          */
 396         struct se_node_acl *pr_res_holder;
 397         struct list_head registration_list;
 398         struct list_head aptpl_reg_list;
 399 };
 400
 401 struct se_tmr_req {
 402         /* Task Management function to be performed */
 403         u8                      function;
 404         /* Task Management response to send */
 405         u8                      response;
 406         int                     call_transport;
 407         /* Reference to ITT that Task Mgmt should be performed */
 408         u64                     ref_task_tag;
 409         void                    *fabric_tmr_ptr;
 410         struct se_cmd           *task_cmd;
 411         struct se_device        *tmr_dev;
 412         struct list_head        tmr_list;
 413 };
 414
 415 enum target_prot_op {
 416         TARGET_PROT_NORMAL      = 0,
 417         TARGET_PROT_DIN_INSERT  = (1 << 0),
 418         TARGET_PROT_DOUT_INSERT = (1 << 1),
 419         TARGET_PROT_DIN_STRIP   = (1 << 2),
 420         TARGET_PROT_DOUT_STRIP  = (1 << 3),
 421         TARGET_PROT_DIN_PASS    = (1 << 4),
 422         TARGET_PROT_DOUT_PASS   = (1 << 5),
 423 };
 424
 425 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
 426                         TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
 427                         TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
 428
 429 enum target_prot_type {
 430         TARGET_DIF_TYPE0_PROT,
 431         TARGET_DIF_TYPE1_PROT,
 432         TARGET_DIF_TYPE2_PROT,
 433         TARGET_DIF_TYPE3_PROT,
 434 };
 435
 436 enum target_core_dif_check {
 437         TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
 438         TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
 439         TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
 440 };
 441
 442 /* for sam_task_attr */
 443 #define TCM_SIMPLE_TAG  0x20
 444 #define TCM_HEAD_TAG    0x21
 445 #define TCM_ORDERED_TAG 0x22
 446 #define TCM_ACA_TAG     0x24
 447
 448 struct se_cmd {
 449         /* SAM response code being sent to initiator */
 450         u8                      scsi_status;
 451         u8                      scsi_asc;
 452         u8                      scsi_ascq;
 453         u16                     scsi_sense_length;
 454         unsigned                unknown_data_length:1;
 455         bool                    state_active:1;
 456         u64                     tag; /* SAM command identifier aka task tag */
 457         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 458         int                     alua_nonop_delay;
 459         /* See include/linux/dma-mapping.h */
 460         enum dma_data_direction data_direction;
 461         /* For SAM Task Attribute */
 462         int                     sam_task_attr;
 463         /* Used for se_sess->sess_tag_pool */
 464         unsigned int            map_tag;
 465         int                     map_cpu;
 466         /* Transport protocol dependent state, see transport_state_table */
 467         enum transport_state_table t_state;
 468         /* See se_cmd_flags_table */
 469         u32                     se_cmd_flags;
 470         /* Total size in bytes associated with command */
 471         u32                     data_length;
 472         u32                     residual_count;
 473         u64                     orig_fe_lun;
 474         /* Persistent Reservation key */
 475         u64                     pr_res_key;
 476         /* Used for sense data */
 477         void                    *sense_buffer;
 478         struct list_head        se_delayed_node;
 479         struct list_head        se_qf_node;
 480         struct se_device      *se_dev;
 481         struct se_lun           *se_lun;
 482         /* Only used for internal passthrough and legacy TCM fabric modules */
 483         struct se_session       *se_sess;
 484         struct se_tmr_req       *se_tmr_req;
 485         struct list_head        se_cmd_list;
 486         struct completion       *free_compl;
 487         struct completion       *abrt_compl;
 488         const struct target_core_fabric_ops *se_tfo;
 489         sense_reason_t          (*execute_cmd)(struct se_cmd *);
 490         sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
 491         void                    *protocol_data;
 492
 493         unsigned char           *t_task_cdb;
 494         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 495         unsigned long long      t_task_lba;
 496         unsigned int            t_task_nolb;
 497         unsigned int            transport_state;
 498 #define CMD_T_ABORTED           (1 << 0)
 499 #define CMD_T_ACTIVE            (1 << 1)
 500 #define CMD_T_COMPLETE          (1 << 2)
 501 #define CMD_T_SENT              (1 << 4)
 502 #define CMD_T_STOP              (1 << 5)
 503 #define CMD_T_TAS               (1 << 10)
 504 #define CMD_T_FABRIC_STOP       (1 << 11)
 505         spinlock_t              t_state_lock;
 506         struct kref             cmd_kref;
 507         struct completion       t_transport_stop_comp;
 508
 509         struct work_struct      work;
 510
 511         struct scatterlist      *t_data_sg;
 512         struct scatterlist      *t_data_sg_orig;
 513         unsigned int            t_data_nents;
 514         unsigned int            t_data_nents_orig;
 515         void                    *t_data_vmap;
 516         struct scatterlist      *t_bidi_data_sg;
 517         unsigned int            t_bidi_data_nents;
 518
 519         /* Used for lun->lun_ref counting */
 520         int                     lun_ref_active;
 521
 522         struct list_head        state_list;
 523
 524         /* backend private data */
 525         void                    *priv;
 526
 527         /* DIF related members */
 528         enum target_prot_op     prot_op;
 529         enum target_prot_type   prot_type;
 530         u8                      prot_checks;
 531         bool                    prot_pto;
 532         u32                     prot_length;
 533         u32                     reftag_seed;
 534         struct scatterlist      *t_prot_sg;
 535         unsigned int            t_prot_nents;
 536         sense_reason_t          pi_err;
 537         sector_t                bad_sector;
 538         int                     cpuid;
 539 };
 540
 541 struct se_ua {
 542         u8                      ua_asc;
 543         u8                      ua_ascq;
 544         struct list_head        ua_nacl_list;
 545 };
 546
 547 struct se_node_acl {
 548         char                    initiatorname[TRANSPORT_IQN_LEN];
 549         /* Used to signal demo mode created ACL, disabled by default */
 550         bool                    dynamic_node_acl;
 551         bool                    dynamic_stop;
 552         u32                     queue_depth;
 553         u32                     acl_index;
 554         enum target_prot_type   saved_prot_type;
 555 #define MAX_ACL_TAG_SIZE 64
 556         char                    acl_tag[MAX_ACL_TAG_SIZE];
 557         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 558         atomic_t                acl_pr_ref_count;
 559         struct hlist_head       lun_entry_hlist;
 560         struct se_session       *nacl_sess;
 561         struct se_portal_group *se_tpg;
 562         struct mutex            lun_entry_mutex;
 563         spinlock_t              nacl_sess_lock;
 564         struct config_group     acl_group;
 565         struct config_group     acl_attrib_group;
 566         struct config_group     acl_auth_group;
 567         struct config_group     acl_param_group;
 568         struct config_group     acl_fabric_stat_group;
 569         struct list_head        acl_list;
 570         struct list_head        acl_sess_list;
 571         struct completion       acl_free_comp;
 572         struct kref             acl_kref;
 573 };
 574
 575 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
 576 {
 577         return container_of(to_config_group(item), struct se_node_acl,
 578                         acl_group);
 579 }
 580
 581 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
 582 {
 583         return container_of(to_config_group(item), struct se_node_acl,
 584                         acl_attrib_group);
 585 }
 586
 587 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
 588 {
 589         return container_of(to_config_group(item), struct se_node_acl,
 590                         acl_auth_group);
 591 }
 592
 593 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
 594 {
 595         return container_of(to_config_group(item), struct se_node_acl,
 596                         acl_param_group);
 597 }
 598
 599 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
 600 {
 601         return container_of(to_config_group(item), struct se_node_acl,
 602                         acl_fabric_stat_group);
 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 percpu_ref       cmd_count;
 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         wait_queue_head_t       cmd_list_wq;
 619         void                    *sess_cmd_map;
 620         struct sbitmap_queue    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         u64                     mapped_lun;
 635         struct se_node_acl      *se_lun_nacl;
 636         struct se_lun           *se_lun;
 637         struct config_group     se_lun_group;
 638         struct se_ml_stat_grps  ml_stat_grps;
 639 };
 640
 641 struct se_dev_entry {
 642         u64                     mapped_lun;
 643         u64                     pr_res_key;
 644         u64                     creation_time;
 645         bool                    lun_access_ro;
 646         u32                     attach_count;
 647         atomic_long_t           total_cmds;
 648         atomic_long_t           read_bytes;
 649         atomic_long_t           write_bytes;
 650         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 651         struct kref             pr_kref;
 652         struct completion       pr_comp;
 653         struct se_lun_acl __rcu *se_lun_acl;
 654         spinlock_t              ua_lock;
 655         struct se_lun __rcu     *se_lun;
 656 #define DEF_PR_REG_ACTIVE               1
 657         unsigned long           deve_flags;
 658         struct list_head        alua_port_list;
 659         struct list_head        lun_link;
 660         struct list_head        ua_list;
 661         struct hlist_node       link;
 662         struct rcu_head         rcu_head;
 663 };
 664
 665 struct se_dev_attrib {
 666         int             emulate_model_alias;
 667         int             emulate_dpo;
 668         int             emulate_fua_write;
 669         int             emulate_fua_read;
 670         int             emulate_write_cache;
 671         int             emulate_ua_intlck_ctrl;
 672         int             emulate_tas;
 673         int             emulate_tpu;
 674         int             emulate_tpws;
 675         int             emulate_caw;
 676         int             emulate_3pc;
 677         int             emulate_pr;
 678         enum target_prot_type pi_prot_type;
 679         enum target_prot_type hw_pi_prot_type;
 680         int             pi_prot_verify;
 681         int             enforce_pr_isids;
 682         int             force_pr_aptpl;
 683         int             is_nonrot;
 684         int             emulate_rest_reord;
 685         int             unmap_zeroes_data;
 686         u32             hw_block_size;
 687         u32             block_size;
 688         u32             hw_max_sectors;
 689         u32             optimal_sectors;
 690         u32             hw_queue_depth;
 691         u32             queue_depth;
 692         u32             max_unmap_lba_count;
 693         u32             max_unmap_block_desc_count;
 694         u32             unmap_granularity;
 695         u32             unmap_granularity_alignment;
 696         u32             max_write_same_len;
 697         u32             max_bytes_per_io;
 698         struct se_device *da_dev;
 699         struct config_group da_group;
 700 };
 701
 702 struct se_port_stat_grps {
 703         struct config_group stat_group;
 704         struct config_group scsi_port_group;
 705         struct config_group scsi_tgt_port_group;
 706         struct config_group scsi_transport_group;
 707 };
 708
 709 struct scsi_port_stats {
 710         atomic_long_t   cmd_pdus;
 711         atomic_long_t   tx_data_octets;
 712         atomic_long_t   rx_data_octets;
 713 };
 714
 715 struct se_lun {
 716         u64                     unpacked_lun;
 717         bool                    lun_shutdown;
 718         bool                    lun_access_ro;
 719         u32                     lun_index;
 720
 721         /* RELATIVE TARGET PORT IDENTIFER */
 722         u16                     lun_rtpi;
 723         atomic_t                lun_acl_count;
 724         struct se_device __rcu  *lun_se_dev;
 725
 726         struct list_head        lun_deve_list;
 727         spinlock_t              lun_deve_lock;
 728
 729         /* ALUA state */
 730         int                     lun_tg_pt_secondary_stat;
 731         int                     lun_tg_pt_secondary_write_md;
 732         atomic_t                lun_tg_pt_secondary_offline;
 733         struct mutex            lun_tg_pt_md_mutex;
 734
 735         /* ALUA target port group linkage */
 736         struct list_head        lun_tg_pt_gp_link;
 737         struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
 738         spinlock_t              lun_tg_pt_gp_lock;
 739
 740         struct se_portal_group  *lun_tpg;
 741         struct scsi_port_stats  lun_stats;
 742         struct config_group     lun_group;
 743         struct se_port_stat_grps port_stat_grps;
 744         struct completion       lun_shutdown_comp;
 745         struct percpu_ref       lun_ref;
 746         struct list_head        lun_dev_link;
 747         struct hlist_node       link;
 748         struct rcu_head         rcu_head;
 749 };
 750
 751 struct se_dev_stat_grps {
 752         struct config_group stat_group;
 753         struct config_group scsi_dev_group;
 754         struct config_group scsi_tgt_dev_group;
 755         struct config_group scsi_lu_group;
 756 };
 757
 758 struct se_device {
 759         /* RELATIVE TARGET PORT IDENTIFER Counter */
 760         u16                     dev_rpti_counter;
 761         /* Used for SAM Task Attribute ordering */
 762         u32                     dev_cur_ordered_id;
 763         u32                     dev_flags;
 764 #define DF_CONFIGURED                           0x00000001
 765 #define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
 766 #define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
 767 #define DF_USING_UDEV_PATH                      0x00000008
 768 #define DF_USING_ALIAS                          0x00000010
 769 #define DF_READ_ONLY                            0x00000020
 770         /* Physical device queue depth */
 771         u32                     queue_depth;
 772         /* Used for SPC-2 reservations enforce of ISIDs */
 773         u64                     dev_res_bin_isid;
 774         /* Pointer to transport specific device structure */
 775         u32                     dev_index;
 776         u64                     creation_time;
 777         atomic_long_t           num_resets;
 778         atomic_long_t           aborts_complete;
 779         atomic_long_t           aborts_no_task;
 780         atomic_long_t           num_cmds;
 781         atomic_long_t           read_bytes;
 782         atomic_long_t           write_bytes;
 783         /* Active commands on this virtual SE device */
 784         atomic_t                simple_cmds;
 785         atomic_t                dev_ordered_sync;
 786         atomic_t                dev_qf_count;
 787         u32                     export_count;
 788         spinlock_t              delayed_cmd_lock;
 789         spinlock_t              execute_task_lock;
 790         spinlock_t              dev_reservation_lock;
 791         unsigned int            dev_reservation_flags;
 792 #define DRF_SPC2_RESERVATIONS                   0x00000001
 793 #define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
 794         spinlock_t              se_port_lock;
 795         spinlock_t              se_tmr_lock;
 796         spinlock_t              qf_cmd_lock;
 797         struct semaphore        caw_sem;
 798         /* Used for legacy SPC-2 reservationsa */
 799         struct se_node_acl      *dev_reserved_node_acl;
 800         /* Used for ALUA Logical Unit Group membership */
 801         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 802         /* Used for SPC-3 Persistent Reservations */
 803         struct t10_pr_registration *dev_pr_res_holder;
 804         struct list_head        dev_sep_list;
 805         struct list_head        dev_tmr_list;
 806         struct work_struct      qf_work_queue;
 807         struct list_head        delayed_cmd_list;
 808         struct list_head        state_list;
 809         struct list_head        qf_cmd_list;
 810         /* Pointer to associated SE HBA */
 811         struct se_hba           *se_hba;
 812         /* T10 Inquiry and VPD WWN Information */
 813         struct t10_wwn          t10_wwn;
 814         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 815         struct t10_alua         t10_alua;
 816         /* T10 SPC-2 + SPC-3 Reservations */
 817         struct t10_reservation  t10_pr;
 818         struct se_dev_attrib    dev_attrib;
 819         struct config_group     dev_action_group;
 820         struct config_group     dev_group;
 821         struct config_group     dev_pr_group;
 822         struct se_dev_stat_grps dev_stat_grps;
 823 #define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
 824         unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
 825 #define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
 826         unsigned char           udev_path[SE_UDEV_PATH_LEN];
 827         /* Pointer to template of function pointers for transport */
 828         const struct target_backend_ops *transport;
 829         struct se_lun           xcopy_lun;
 830         /* Protection Information */
 831         int                     prot_length;
 832         /* For se_lun->lun_se_dev RCU read-side critical access */
 833         u32                     hba_index;
 834         struct rcu_head         rcu_head;
 835 };
 836
 837 struct se_hba {
 838         u16                     hba_tpgt;
 839         u32                     hba_id;
 840         /* See hba_flags_table */
 841         u32                     hba_flags;
 842         /* Virtual iSCSI devices attached. */
 843         u32                     dev_count;
 844         u32                     hba_index;
 845         /* Pointer to transport specific host structure. */
 846         void                    *hba_ptr;
 847         struct list_head        hba_node;
 848         spinlock_t              device_lock;
 849         struct config_group     hba_group;
 850         struct mutex            hba_access_mutex;
 851         struct target_backend   *backend;
 852 };
 853
 854 struct se_tpg_np {
 855         struct se_portal_group *tpg_np_parent;
 856         struct config_group     tpg_np_group;
 857 };
 858
 859 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
 860 {
 861         return container_of(to_config_group(item), struct se_tpg_np,
 862                         tpg_np_group);
 863 }
 864
 865 struct se_portal_group {
 866         /*
 867          * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
 868          *
 869          * Negative values can be used by fabric drivers for internal use TPGs.
 870          */
 871         int                     proto_id;
 872         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 873         atomic_t                tpg_pr_ref_count;
 874         /* Spinlock for adding/removing ACLed Nodes */
 875         struct mutex            acl_node_mutex;
 876         /* Spinlock for adding/removing sessions */
 877         spinlock_t              session_lock;
 878         struct mutex            tpg_lun_mutex;
 879         struct list_head        se_tpg_node;
 880         /* linked list for initiator ACL list */
 881         struct list_head        acl_node_list;
 882         struct hlist_head       tpg_lun_hlist;
 883         struct se_lun           *tpg_virt_lun0;
 884         /* List of TCM sessions associated wth this TPG */
 885         struct list_head        tpg_sess_list;
 886         /* Pointer to $FABRIC_MOD dependent code */
 887         const struct target_core_fabric_ops *se_tpg_tfo;
 888         struct se_wwn           *se_tpg_wwn;
 889         struct config_group     tpg_group;
 890         struct config_group     tpg_lun_group;
 891         struct config_group     tpg_np_group;
 892         struct config_group     tpg_acl_group;
 893         struct config_group     tpg_attrib_group;
 894         struct config_group     tpg_auth_group;
 895         struct config_group     tpg_param_group;
 896 };
 897
 898 static inline struct se_portal_group *to_tpg(struct config_item *item)
 899 {
 900         return container_of(to_config_group(item), struct se_portal_group,
 901                         tpg_group);
 902 }
 903
 904 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
 905 {
 906         return container_of(to_config_group(item), struct se_portal_group,
 907                         tpg_attrib_group);
 908 }
 909
 910 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
 911 {
 912         return container_of(to_config_group(item), struct se_portal_group,
 913                         tpg_auth_group);
 914 }
 915
 916 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
 917 {
 918         return container_of(to_config_group(item), struct se_portal_group,
 919                         tpg_param_group);
 920 }
 921
 922 struct se_wwn {
 923         struct target_fabric_configfs *wwn_tf;
 924         void                    *priv;
 925         struct config_group     wwn_group;
 926         struct config_group     fabric_stat_group;
 927 };
 928
 929 static inline void atomic_inc_mb(atomic_t *v)
 930 {
 931         smp_mb__before_atomic();
 932         atomic_inc(v);
 933         smp_mb__after_atomic();
 934 }
 935
 936 static inline void atomic_dec_mb(atomic_t *v)
 937 {
 938         smp_mb__before_atomic();
 939         atomic_dec(v);
 940         smp_mb__after_atomic();
 941 }
 942
 943 static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
 944 {
 945         sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
 946 }
 947
 948 #endif /* TARGET_CORE_BASE_H */