linux/include/target/target_core_base.h
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   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 unmap_zeroes_data */
  67#define DA_UNMAP_ZEROES_DATA_DEFAULT            0
  68/* Default max_write_same_len, disabled by default */
  69#define DA_MAX_WRITE_SAME_LEN                   0
  70/* Use a model alias based on the configfs backend device name */
  71#define DA_EMULATE_MODEL_ALIAS                  0
  72/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
  73#define DA_EMULATE_WRITE_CACHE                  0
  74/* Emulation for UNIT ATTENTION Interlock Control */
  75#define DA_EMULATE_UA_INTLLCK_CTRL              0
  76/* Emulation for TASK_ABORTED status (TAS) by default */
  77#define DA_EMULATE_TAS                          1
  78/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
  79#define DA_EMULATE_TPU                          0
  80/*
  81 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
  82 * block/blk-lib.c:blkdev_issue_discard()
  83 */
  84#define DA_EMULATE_TPWS                         0
  85/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
  86#define DA_EMULATE_CAW                          1
  87/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
  88#define DA_EMULATE_3PC                          1
  89/* No Emulation for PSCSI by default */
  90#define DA_EMULATE_ALUA                         0
  91/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
  92#define DA_ENFORCE_PR_ISIDS                     1
  93/* Force SPC-3 PR Activate Persistence across Target Power Loss */
  94#define DA_FORCE_PR_APTPL                       0
  95#define DA_STATUS_MAX_SECTORS_MIN               16
  96#define DA_STATUS_MAX_SECTORS_MAX               8192
  97/* By default don't report non-rotating (solid state) medium */
  98#define DA_IS_NONROT                            0
  99/* Queue Algorithm Modifier default for restricted reordering in control mode page */
 100#define DA_EMULATE_REST_REORD                   0
 101
 102#define SE_INQUIRY_BUF                          1024
 103#define SE_MODE_PAGE_BUF                        512
 104#define SE_SENSE_BUF                            96
 105
 106/* struct se_hba->hba_flags */
 107enum hba_flags_table {
 108        HBA_FLAGS_INTERNAL_USE  = 0x01,
 109        HBA_FLAGS_PSCSI_MODE    = 0x02,
 110};
 111
 112/* Special transport agnostic struct se_cmd->t_states */
 113enum transport_state_table {
 114        TRANSPORT_NO_STATE      = 0,
 115        TRANSPORT_NEW_CMD       = 1,
 116        TRANSPORT_WRITE_PENDING = 3,
 117        TRANSPORT_PROCESSING    = 5,
 118        TRANSPORT_COMPLETE      = 6,
 119        TRANSPORT_ISTATE_PROCESSING = 11,
 120        TRANSPORT_COMPLETE_QF_WP = 18,
 121        TRANSPORT_COMPLETE_QF_OK = 19,
 122};
 123
 124/* Used for struct se_cmd->se_cmd_flags */
 125enum se_cmd_flags_table {
 126        SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
 127        SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
 128        SCF_EMULATED_TASK_SENSE         = 0x00000004,
 129        SCF_SCSI_DATA_CDB               = 0x00000008,
 130        SCF_SCSI_TMR_CDB                = 0x00000010,
 131        SCF_FUA                         = 0x00000080,
 132        SCF_SE_LUN_CMD                  = 0x00000100,
 133        SCF_BIDI                        = 0x00000400,
 134        SCF_SENT_CHECK_CONDITION        = 0x00000800,
 135        SCF_OVERFLOW_BIT                = 0x00001000,
 136        SCF_UNDERFLOW_BIT               = 0x00002000,
 137        SCF_SEND_DELAYED_TAS            = 0x00004000,
 138        SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
 139        SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 140        SCF_COMPARE_AND_WRITE           = 0x00080000,
 141        SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
 142        SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
 143        SCF_ACK_KREF                    = 0x00400000,
 144        SCF_USE_CPUID                   = 0x00800000,
 145};
 146
 147/*
 148 * Used by transport_send_check_condition_and_sense()
 149 * to signal which ASC/ASCQ sense payload should be built.
 150 */
 151typedef unsigned __bitwise__ sense_reason_t;
 152
 153enum tcm_sense_reason_table {
 154#define R(x)    (__force sense_reason_t )(x)
 155        TCM_NO_SENSE                            = R(0x00),
 156        TCM_NON_EXISTENT_LUN                    = R(0x01),
 157        TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
 158        TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
 159        TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
 160        TCM_SERVICE_CRC_ERROR                   = R(0x05),
 161        TCM_SNACK_REJECTED                      = R(0x06),
 162        TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
 163        TCM_INVALID_CDB_FIELD                   = R(0x08),
 164        TCM_INVALID_PARAMETER_LIST              = R(0x09),
 165        TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
 166        TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
 167        TCM_WRITE_PROTECTED                     = R(0x0c),
 168        TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
 169        TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
 170        TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
 171        TCM_RESERVATION_CONFLICT                = R(0x10),
 172        TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
 173        TCM_OUT_OF_RESOURCES                    = R(0x12),
 174        TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
 175        TCM_MISCOMPARE_VERIFY                   = R(0x14),
 176        TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
 177        TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
 178        TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
 179#undef R
 180};
 181
 182enum target_sc_flags_table {
 183        TARGET_SCF_BIDI_OP              = 0x01,
 184        TARGET_SCF_ACK_KREF             = 0x02,
 185        TARGET_SCF_UNKNOWN_SIZE         = 0x04,
 186        TARGET_SCF_USE_CPUID    = 0x08,
 187};
 188
 189/* fabric independent task management function values */
 190enum tcm_tmreq_table {
 191        TMR_ABORT_TASK          = 1,
 192        TMR_ABORT_TASK_SET      = 2,
 193        TMR_CLEAR_ACA           = 3,
 194        TMR_CLEAR_TASK_SET      = 4,
 195        TMR_LUN_RESET           = 5,
 196        TMR_TARGET_WARM_RESET   = 6,
 197        TMR_TARGET_COLD_RESET   = 7,
 198};
 199
 200/* fabric independent task management response values */
 201enum tcm_tmrsp_table {
 202        TMR_FUNCTION_FAILED             = 0,
 203        TMR_FUNCTION_COMPLETE           = 1,
 204        TMR_TASK_DOES_NOT_EXIST         = 2,
 205        TMR_LUN_DOES_NOT_EXIST          = 3,
 206        TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
 207        TMR_FUNCTION_REJECTED           = 5,
 208};
 209
 210/*
 211 * Used for target SCSI statistics
 212 */
 213typedef enum {
 214        SCSI_INST_INDEX,
 215        SCSI_DEVICE_INDEX,
 216        SCSI_AUTH_INTR_INDEX,
 217        SCSI_INDEX_TYPE_MAX
 218} scsi_index_t;
 219
 220struct se_cmd;
 221
 222struct t10_alua_lba_map_member {
 223        struct list_head lba_map_mem_list;
 224        int lba_map_mem_alua_state;
 225        int lba_map_mem_alua_pg_id;
 226};
 227
 228struct t10_alua_lba_map {
 229        u64 lba_map_first_lba;
 230        u64 lba_map_last_lba;
 231        struct list_head lba_map_list;
 232        struct list_head lba_map_mem_list;
 233};
 234
 235struct t10_alua {
 236        /* ALUA Target Port Group ID */
 237        u16     alua_tg_pt_gps_counter;
 238        u32     alua_tg_pt_gps_count;
 239        /* Referrals support */
 240        spinlock_t lba_map_lock;
 241        u32     lba_map_segment_size;
 242        u32     lba_map_segment_multiplier;
 243        struct list_head lba_map_list;
 244        spinlock_t tg_pt_gps_lock;
 245        struct se_device *t10_dev;
 246        /* Used for default ALUA Target Port Group */
 247        struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 248        /* Used for default ALUA Target Port Group ConfigFS group */
 249        struct config_group alua_tg_pt_gps_group;
 250        struct list_head tg_pt_gps_list;
 251};
 252
 253struct t10_alua_lu_gp {
 254        u16     lu_gp_id;
 255        int     lu_gp_valid_id;
 256        u32     lu_gp_members;
 257        atomic_t lu_gp_ref_cnt;
 258        spinlock_t lu_gp_lock;
 259        struct config_group lu_gp_group;
 260        struct list_head lu_gp_node;
 261        struct list_head lu_gp_mem_list;
 262};
 263
 264struct t10_alua_lu_gp_member {
 265        bool lu_gp_assoc;
 266        atomic_t lu_gp_mem_ref_cnt;
 267        spinlock_t lu_gp_mem_lock;
 268        struct t10_alua_lu_gp *lu_gp;
 269        struct se_device *lu_gp_mem_dev;
 270        struct list_head lu_gp_mem_list;
 271};
 272
 273struct t10_alua_tg_pt_gp {
 274        u16     tg_pt_gp_id;
 275        int     tg_pt_gp_valid_id;
 276        int     tg_pt_gp_alua_supported_states;
 277        int     tg_pt_gp_alua_pending_state;
 278        int     tg_pt_gp_alua_previous_state;
 279        int     tg_pt_gp_alua_access_status;
 280        int     tg_pt_gp_alua_access_type;
 281        int     tg_pt_gp_nonop_delay_msecs;
 282        int     tg_pt_gp_trans_delay_msecs;
 283        int     tg_pt_gp_implicit_trans_secs;
 284        int     tg_pt_gp_pref;
 285        int     tg_pt_gp_write_metadata;
 286        u32     tg_pt_gp_members;
 287        atomic_t tg_pt_gp_alua_access_state;
 288        atomic_t tg_pt_gp_ref_cnt;
 289        spinlock_t tg_pt_gp_lock;
 290        struct mutex tg_pt_gp_md_mutex;
 291        struct se_device *tg_pt_gp_dev;
 292        struct config_group tg_pt_gp_group;
 293        struct list_head tg_pt_gp_list;
 294        struct list_head tg_pt_gp_lun_list;
 295        struct se_lun *tg_pt_gp_alua_lun;
 296        struct se_node_acl *tg_pt_gp_alua_nacl;
 297        struct delayed_work tg_pt_gp_transition_work;
 298        struct completion *tg_pt_gp_transition_complete;
 299};
 300
 301struct t10_vpd {
 302        unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 303        int protocol_identifier_set;
 304        u32 protocol_identifier;
 305        u32 device_identifier_code_set;
 306        u32 association;
 307        u32 device_identifier_type;
 308        struct list_head vpd_list;
 309};
 310
 311struct t10_wwn {
 312        char vendor[8];
 313        char model[16];
 314        char revision[4];
 315        char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 316        spinlock_t t10_vpd_lock;
 317        struct se_device *t10_dev;
 318        struct config_group t10_wwn_group;
 319        struct list_head t10_vpd_list;
 320};
 321
 322struct t10_pr_registration {
 323        /* Used for fabrics that contain WWN+ISID */
 324#define PR_REG_ISID_LEN                         16
 325        /* PR_REG_ISID_LEN + ',i,0x' */
 326#define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
 327        char pr_reg_isid[PR_REG_ISID_LEN];
 328        /* Used during APTPL metadata reading */
 329#define PR_APTPL_MAX_IPORT_LEN                  256
 330        unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
 331        /* Used during APTPL metadata reading */
 332#define PR_APTPL_MAX_TPORT_LEN                  256
 333        unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
 334        u16 pr_aptpl_rpti;
 335        u16 pr_reg_tpgt;
 336        /* Reservation effects all target ports */
 337        int pr_reg_all_tg_pt;
 338        /* Activate Persistence across Target Power Loss */
 339        int pr_reg_aptpl;
 340        int pr_res_holder;
 341        int pr_res_type;
 342        int pr_res_scope;
 343        /* Used for fabric initiator WWPNs using a ISID */
 344        bool isid_present_at_reg;
 345        u64 pr_res_mapped_lun;
 346        u64 pr_aptpl_target_lun;
 347        u16 tg_pt_sep_rtpi;
 348        u32 pr_res_generation;
 349        u64 pr_reg_bin_isid;
 350        u64 pr_res_key;
 351        atomic_t pr_res_holders;
 352        struct se_node_acl *pr_reg_nacl;
 353        /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
 354        struct se_dev_entry *pr_reg_deve;
 355        struct list_head pr_reg_list;
 356        struct list_head pr_reg_abort_list;
 357        struct list_head pr_reg_aptpl_list;
 358        struct list_head pr_reg_atp_list;
 359        struct list_head pr_reg_atp_mem_list;
 360};
 361
 362struct t10_reservation {
 363        /* Reservation effects all target ports */
 364        int pr_all_tg_pt;
 365        /* Activate Persistence across Target Power Loss enabled
 366         * for SCSI device */
 367        int pr_aptpl_active;
 368#define PR_APTPL_BUF_LEN                        262144
 369        u32 pr_generation;
 370        spinlock_t registration_lock;
 371        spinlock_t aptpl_reg_lock;
 372        /*
 373         * This will always be set by one individual I_T Nexus.
 374         * However with all_tg_pt=1, other I_T Nexus from the
 375         * same initiator can access PR reg/res info on a different
 376         * target port.
 377         *
 378         * There is also the 'All Registrants' case, where there is
 379         * a single *pr_res_holder of the reservation, but all
 380         * registrations are considered reservation holders.
 381         */
 382        struct se_node_acl *pr_res_holder;
 383        struct list_head registration_list;
 384        struct list_head aptpl_reg_list;
 385};
 386
 387struct se_tmr_req {
 388        /* Task Management function to be performed */
 389        u8                      function;
 390        /* Task Management response to send */
 391        u8                      response;
 392        int                     call_transport;
 393        /* Reference to ITT that Task Mgmt should be performed */
 394        u64                     ref_task_tag;
 395        void                    *fabric_tmr_ptr;
 396        struct se_cmd           *task_cmd;
 397        struct se_device        *tmr_dev;
 398        struct se_lun           *tmr_lun;
 399        struct list_head        tmr_list;
 400};
 401
 402enum target_prot_op {
 403        TARGET_PROT_NORMAL      = 0,
 404        TARGET_PROT_DIN_INSERT  = (1 << 0),
 405        TARGET_PROT_DOUT_INSERT = (1 << 1),
 406        TARGET_PROT_DIN_STRIP   = (1 << 2),
 407        TARGET_PROT_DOUT_STRIP  = (1 << 3),
 408        TARGET_PROT_DIN_PASS    = (1 << 4),
 409        TARGET_PROT_DOUT_PASS   = (1 << 5),
 410};
 411
 412#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
 413                        TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
 414                        TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
 415
 416enum target_prot_type {
 417        TARGET_DIF_TYPE0_PROT,
 418        TARGET_DIF_TYPE1_PROT,
 419        TARGET_DIF_TYPE2_PROT,
 420        TARGET_DIF_TYPE3_PROT,
 421};
 422
 423enum target_core_dif_check {
 424        TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
 425        TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
 426        TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
 427};
 428
 429/* for sam_task_attr */
 430#define TCM_SIMPLE_TAG  0x20
 431#define TCM_HEAD_TAG    0x21
 432#define TCM_ORDERED_TAG 0x22
 433#define TCM_ACA_TAG     0x24
 434
 435struct se_cmd {
 436        /* SAM response code being sent to initiator */
 437        u8                      scsi_status;
 438        u8                      scsi_asc;
 439        u8                      scsi_ascq;
 440        u16                     scsi_sense_length;
 441        unsigned                cmd_wait_set:1;
 442        unsigned                unknown_data_length:1;
 443        bool                    state_active:1;
 444        u64                     tag; /* SAM command identifier aka task tag */
 445        /* Delay for ALUA Active/NonOptimized state access in milliseconds */
 446        int                     alua_nonop_delay;
 447        /* See include/linux/dma-mapping.h */
 448        enum dma_data_direction data_direction;
 449        /* For SAM Task Attribute */
 450        int                     sam_task_attr;
 451        /* Used for se_sess->sess_tag_pool */
 452        unsigned int            map_tag;
 453        /* Transport protocol dependent state, see transport_state_table */
 454        enum transport_state_table t_state;
 455        /* See se_cmd_flags_table */
 456        u32                     se_cmd_flags;
 457        /* Total size in bytes associated with command */
 458        u32                     data_length;
 459        u32                     residual_count;
 460        u64                     orig_fe_lun;
 461        /* Persistent Reservation key */
 462        u64                     pr_res_key;
 463        /* Used for sense data */
 464        void                    *sense_buffer;
 465        struct list_head        se_delayed_node;
 466        struct list_head        se_qf_node;
 467        struct se_device      *se_dev;
 468        struct se_lun           *se_lun;
 469        /* Only used for internal passthrough and legacy TCM fabric modules */
 470        struct se_session       *se_sess;
 471        struct se_tmr_req       *se_tmr_req;
 472        struct list_head        se_cmd_list;
 473        struct completion       cmd_wait_comp;
 474        const struct target_core_fabric_ops *se_tfo;
 475        sense_reason_t          (*execute_cmd)(struct se_cmd *);
 476        sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
 477        void                    *protocol_data;
 478
 479        unsigned char           *t_task_cdb;
 480        unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
 481        unsigned long long      t_task_lba;
 482        unsigned int            t_task_nolb;
 483        unsigned int            transport_state;
 484#define CMD_T_ABORTED           (1 << 0)
 485#define CMD_T_ACTIVE            (1 << 1)
 486#define CMD_T_COMPLETE          (1 << 2)
 487#define CMD_T_SENT              (1 << 4)
 488#define CMD_T_STOP              (1 << 5)
 489#define CMD_T_DEV_ACTIVE        (1 << 7)
 490#define CMD_T_BUSY              (1 << 9)
 491#define CMD_T_TAS               (1 << 10)
 492#define CMD_T_FABRIC_STOP       (1 << 11)
 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        /* backend private data */
 513        void                    *priv;
 514
 515        /* DIF related members */
 516        enum target_prot_op     prot_op;
 517        enum target_prot_type   prot_type;
 518        u8                      prot_checks;
 519        bool                    prot_pto;
 520        u32                     prot_length;
 521        u32                     reftag_seed;
 522        struct scatterlist      *t_prot_sg;
 523        unsigned int            t_prot_nents;
 524        sense_reason_t          pi_err;
 525        sector_t                bad_sector;
 526        int                     cpuid;
 527};
 528
 529struct se_ua {
 530        u8                      ua_asc;
 531        u8                      ua_ascq;
 532        struct list_head        ua_nacl_list;
 533};
 534
 535struct se_node_acl {
 536        char                    initiatorname[TRANSPORT_IQN_LEN];
 537        /* Used to signal demo mode created ACL, disabled by default */
 538        bool                    dynamic_node_acl;
 539        bool                    acl_stop:1;
 540        u32                     queue_depth;
 541        u32                     acl_index;
 542        enum target_prot_type   saved_prot_type;
 543#define MAX_ACL_TAG_SIZE 64
 544        char                    acl_tag[MAX_ACL_TAG_SIZE];
 545        /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 546        atomic_t                acl_pr_ref_count;
 547        struct hlist_head       lun_entry_hlist;
 548        struct se_session       *nacl_sess;
 549        struct se_portal_group *se_tpg;
 550        struct mutex            lun_entry_mutex;
 551        spinlock_t              nacl_sess_lock;
 552        struct config_group     acl_group;
 553        struct config_group     acl_attrib_group;
 554        struct config_group     acl_auth_group;
 555        struct config_group     acl_param_group;
 556        struct config_group     acl_fabric_stat_group;
 557        struct list_head        acl_list;
 558        struct list_head        acl_sess_list;
 559        struct completion       acl_free_comp;
 560        struct kref             acl_kref;
 561};
 562
 563static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
 564{
 565        return container_of(to_config_group(item), struct se_node_acl,
 566                        acl_group);
 567}
 568
 569static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
 570{
 571        return container_of(to_config_group(item), struct se_node_acl,
 572                        acl_attrib_group);
 573}
 574
 575static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
 576{
 577        return container_of(to_config_group(item), struct se_node_acl,
 578                        acl_auth_group);
 579}
 580
 581static inline struct se_node_acl *param_to_nacl(struct config_item *item)
 582{
 583        return container_of(to_config_group(item), struct se_node_acl,
 584                        acl_param_group);
 585}
 586
 587static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
 588{
 589        return container_of(to_config_group(item), struct se_node_acl,
 590                        acl_fabric_stat_group);
 591}
 592
 593struct se_session {
 594        unsigned                sess_tearing_down:1;
 595        u64                     sess_bin_isid;
 596        enum target_prot_op     sup_prot_ops;
 597        enum target_prot_type   sess_prot_type;
 598        struct se_node_acl      *se_node_acl;
 599        struct se_portal_group *se_tpg;
 600        void                    *fabric_sess_ptr;
 601        struct list_head        sess_list;
 602        struct list_head        sess_acl_list;
 603        struct list_head        sess_cmd_list;
 604        struct list_head        sess_wait_list;
 605        spinlock_t              sess_cmd_lock;
 606        struct kref             sess_kref;
 607        void                    *sess_cmd_map;
 608        struct percpu_ida       sess_tag_pool;
 609};
 610
 611struct se_device;
 612struct se_transform_info;
 613struct scatterlist;
 614
 615struct se_ml_stat_grps {
 616        struct config_group     stat_group;
 617        struct config_group     scsi_auth_intr_group;
 618        struct config_group     scsi_att_intr_port_group;
 619};
 620
 621struct se_lun_acl {
 622        u64                     mapped_lun;
 623        struct se_node_acl      *se_lun_nacl;
 624        struct se_lun           *se_lun;
 625        struct config_group     se_lun_group;
 626        struct se_ml_stat_grps  ml_stat_grps;
 627};
 628
 629struct se_dev_entry {
 630        u64                     mapped_lun;
 631        u64                     pr_res_key;
 632        u64                     creation_time;
 633        bool                    lun_access_ro;
 634        u32                     attach_count;
 635        atomic_long_t           total_cmds;
 636        atomic_long_t           read_bytes;
 637        atomic_long_t           write_bytes;
 638        atomic_t                ua_count;
 639        /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 640        struct kref             pr_kref;
 641        struct completion       pr_comp;
 642        struct se_lun_acl __rcu *se_lun_acl;
 643        spinlock_t              ua_lock;
 644        struct se_lun __rcu     *se_lun;
 645#define DEF_PR_REG_ACTIVE               1
 646        unsigned long           deve_flags;
 647        struct list_head        alua_port_list;
 648        struct list_head        lun_link;
 649        struct list_head        ua_list;
 650        struct hlist_node       link;
 651        struct rcu_head         rcu_head;
 652};
 653
 654struct se_dev_attrib {
 655        int             emulate_model_alias;
 656        int             emulate_dpo;
 657        int             emulate_fua_write;
 658        int             emulate_fua_read;
 659        int             emulate_write_cache;
 660        int             emulate_ua_intlck_ctrl;
 661        int             emulate_tas;
 662        int             emulate_tpu;
 663        int             emulate_tpws;
 664        int             emulate_caw;
 665        int             emulate_3pc;
 666        int             pi_prot_format;
 667        enum target_prot_type pi_prot_type;
 668        enum target_prot_type hw_pi_prot_type;
 669        int             enforce_pr_isids;
 670        int             force_pr_aptpl;
 671        int             is_nonrot;
 672        int             emulate_rest_reord;
 673        int             unmap_zeroes_data;
 674        u32             hw_block_size;
 675        u32             block_size;
 676        u32             hw_max_sectors;
 677        u32             optimal_sectors;
 678        u32             hw_queue_depth;
 679        u32             queue_depth;
 680        u32             max_unmap_lba_count;
 681        u32             max_unmap_block_desc_count;
 682        u32             unmap_granularity;
 683        u32             unmap_granularity_alignment;
 684        u32             max_write_same_len;
 685        u32             max_bytes_per_io;
 686        struct se_device *da_dev;
 687        struct config_group da_group;
 688};
 689
 690struct se_port_stat_grps {
 691        struct config_group stat_group;
 692        struct config_group scsi_port_group;
 693        struct config_group scsi_tgt_port_group;
 694        struct config_group scsi_transport_group;
 695};
 696
 697struct scsi_port_stats {
 698        atomic_long_t   cmd_pdus;
 699        atomic_long_t   tx_data_octets;
 700        atomic_long_t   rx_data_octets;
 701};
 702
 703struct se_lun {
 704        u64                     unpacked_lun;
 705#define SE_LUN_LINK_MAGIC                       0xffff7771
 706        u32                     lun_link_magic;
 707        bool                    lun_access_ro;
 708        u32                     lun_index;
 709
 710        /* RELATIVE TARGET PORT IDENTIFER */
 711        u16                     lun_rtpi;
 712        atomic_t                lun_acl_count;
 713        struct se_device __rcu  *lun_se_dev;
 714
 715        struct list_head        lun_deve_list;
 716        spinlock_t              lun_deve_lock;
 717
 718        /* ALUA state */
 719        int                     lun_tg_pt_secondary_stat;
 720        int                     lun_tg_pt_secondary_write_md;
 721        atomic_t                lun_tg_pt_secondary_offline;
 722        struct mutex            lun_tg_pt_md_mutex;
 723
 724        /* ALUA target port group linkage */
 725        struct list_head        lun_tg_pt_gp_link;
 726        struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
 727        spinlock_t              lun_tg_pt_gp_lock;
 728
 729        struct se_portal_group  *lun_tpg;
 730        struct scsi_port_stats  lun_stats;
 731        struct config_group     lun_group;
 732        struct se_port_stat_grps port_stat_grps;
 733        struct completion       lun_ref_comp;
 734        struct percpu_ref       lun_ref;
 735        struct list_head        lun_dev_link;
 736        struct hlist_node       link;
 737        struct rcu_head         rcu_head;
 738};
 739
 740struct se_dev_stat_grps {
 741        struct config_group stat_group;
 742        struct config_group scsi_dev_group;
 743        struct config_group scsi_tgt_dev_group;
 744        struct config_group scsi_lu_group;
 745};
 746
 747struct se_device {
 748#define SE_DEV_LINK_MAGIC                       0xfeeddeef
 749        u32                     dev_link_magic;
 750        /* RELATIVE TARGET PORT IDENTIFER Counter */
 751        u16                     dev_rpti_counter;
 752        /* Used for SAM Task Attribute ordering */
 753        u32                     dev_cur_ordered_id;
 754        u32                     dev_flags;
 755#define DF_CONFIGURED                           0x00000001
 756#define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
 757#define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
 758#define DF_USING_UDEV_PATH                      0x00000008
 759#define DF_USING_ALIAS                          0x00000010
 760#define DF_READ_ONLY                            0x00000020
 761        /* Physical device queue depth */
 762        u32                     queue_depth;
 763        /* Used for SPC-2 reservations enforce of ISIDs */
 764        u64                     dev_res_bin_isid;
 765        /* Pointer to transport specific device structure */
 766        u32                     dev_index;
 767        u64                     creation_time;
 768        atomic_long_t           num_resets;
 769        atomic_long_t           num_cmds;
 770        atomic_long_t           read_bytes;
 771        atomic_long_t           write_bytes;
 772        /* Active commands on this virtual SE device */
 773        atomic_t                simple_cmds;
 774        atomic_t                dev_ordered_sync;
 775        atomic_t                dev_qf_count;
 776        u32                     export_count;
 777        spinlock_t              delayed_cmd_lock;
 778        spinlock_t              execute_task_lock;
 779        spinlock_t              dev_reservation_lock;
 780        unsigned int            dev_reservation_flags;
 781#define DRF_SPC2_RESERVATIONS                   0x00000001
 782#define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
 783        spinlock_t              se_port_lock;
 784        spinlock_t              se_tmr_lock;
 785        spinlock_t              qf_cmd_lock;
 786        struct semaphore        caw_sem;
 787        /* Used for legacy SPC-2 reservationsa */
 788        struct se_node_acl      *dev_reserved_node_acl;
 789        /* Used for ALUA Logical Unit Group membership */
 790        struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
 791        /* Used for SPC-3 Persistent Reservations */
 792        struct t10_pr_registration *dev_pr_res_holder;
 793        struct list_head        dev_sep_list;
 794        struct list_head        dev_tmr_list;
 795        struct workqueue_struct *tmr_wq;
 796        struct work_struct      qf_work_queue;
 797        struct list_head        delayed_cmd_list;
 798        struct list_head        state_list;
 799        struct list_head        qf_cmd_list;
 800        struct list_head        g_dev_node;
 801        /* Pointer to associated SE HBA */
 802        struct se_hba           *se_hba;
 803        /* T10 Inquiry and VPD WWN Information */
 804        struct t10_wwn          t10_wwn;
 805        /* T10 Asymmetric Logical Unit Assignment for Target Ports */
 806        struct t10_alua         t10_alua;
 807        /* T10 SPC-2 + SPC-3 Reservations */
 808        struct t10_reservation  t10_pr;
 809        struct se_dev_attrib    dev_attrib;
 810        struct config_group     dev_group;
 811        struct config_group     dev_pr_group;
 812        struct se_dev_stat_grps dev_stat_grps;
 813#define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
 814        unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
 815#define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
 816        unsigned char           udev_path[SE_UDEV_PATH_LEN];
 817        /* Pointer to template of function pointers for transport */
 818        const struct target_backend_ops *transport;
 819        /* Linked list for struct se_hba struct se_device list */
 820        struct list_head        dev_list;
 821        struct se_lun           xcopy_lun;
 822        /* Protection Information */
 823        int                     prot_length;
 824        /* For se_lun->lun_se_dev RCU read-side critical access */
 825        u32                     hba_index;
 826        struct rcu_head         rcu_head;
 827};
 828
 829struct se_hba {
 830        u16                     hba_tpgt;
 831        u32                     hba_id;
 832        /* See hba_flags_table */
 833        u32                     hba_flags;
 834        /* Virtual iSCSI devices attached. */
 835        u32                     dev_count;
 836        u32                     hba_index;
 837        /* Pointer to transport specific host structure. */
 838        void                    *hba_ptr;
 839        struct list_head        hba_node;
 840        spinlock_t              device_lock;
 841        struct config_group     hba_group;
 842        struct mutex            hba_access_mutex;
 843        struct target_backend   *backend;
 844};
 845
 846struct se_tpg_np {
 847        struct se_portal_group *tpg_np_parent;
 848        struct config_group     tpg_np_group;
 849};
 850
 851static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
 852{
 853        return container_of(to_config_group(item), struct se_tpg_np,
 854                        tpg_np_group);
 855}
 856
 857struct se_portal_group {
 858        /*
 859         * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
 860         *
 861         * Negative values can be used by fabric drivers for internal use TPGs.
 862         */
 863        int                     proto_id;
 864        /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 865        atomic_t                tpg_pr_ref_count;
 866        /* Spinlock for adding/removing ACLed Nodes */
 867        struct mutex            acl_node_mutex;
 868        /* Spinlock for adding/removing sessions */
 869        spinlock_t              session_lock;
 870        struct mutex            tpg_lun_mutex;
 871        struct list_head        se_tpg_node;
 872        /* linked list for initiator ACL list */
 873        struct list_head        acl_node_list;
 874        struct hlist_head       tpg_lun_hlist;
 875        struct se_lun           *tpg_virt_lun0;
 876        /* List of TCM sessions associated wth this TPG */
 877        struct list_head        tpg_sess_list;
 878        /* Pointer to $FABRIC_MOD dependent code */
 879        const struct target_core_fabric_ops *se_tpg_tfo;
 880        struct se_wwn           *se_tpg_wwn;
 881        struct config_group     tpg_group;
 882        struct config_group     tpg_lun_group;
 883        struct config_group     tpg_np_group;
 884        struct config_group     tpg_acl_group;
 885        struct config_group     tpg_attrib_group;
 886        struct config_group     tpg_auth_group;
 887        struct config_group     tpg_param_group;
 888};
 889
 890static inline struct se_portal_group *to_tpg(struct config_item *item)
 891{
 892        return container_of(to_config_group(item), struct se_portal_group,
 893                        tpg_group);
 894}
 895
 896static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
 897{
 898        return container_of(to_config_group(item), struct se_portal_group,
 899                        tpg_attrib_group);
 900}
 901
 902static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
 903{
 904        return container_of(to_config_group(item), struct se_portal_group,
 905                        tpg_auth_group);
 906}
 907
 908static inline struct se_portal_group *param_to_tpg(struct config_item *item)
 909{
 910        return container_of(to_config_group(item), struct se_portal_group,
 911                        tpg_param_group);
 912}
 913
 914struct se_wwn {
 915        struct target_fabric_configfs *wwn_tf;
 916        struct config_group     wwn_group;
 917        struct config_group     fabric_stat_group;
 918};
 919
 920static inline void atomic_inc_mb(atomic_t *v)
 921{
 922        smp_mb__before_atomic();
 923        atomic_inc(v);
 924        smp_mb__after_atomic();
 925}
 926
 927static inline void atomic_dec_mb(atomic_t *v)
 928{
 929        smp_mb__before_atomic();
 930        atomic_dec(v);
 931        smp_mb__after_atomic();
 932}
 933
 934#endif /* TARGET_CORE_BASE_H */
 935
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